diff --git a/code/games/minimal/CMakeLists.txt b/code/games/minimal/CMakeLists.txt
index 578ca24..449c5ba 100644
--- a/code/games/minimal/CMakeLists.txt
+++ b/code/games/minimal/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_executable(minimal
-    src/main.c
+    src/oldmain.c
     src/platform.c
     src/worldgen.c
     src/texgen.c
diff --git a/code/games/minimal/src/main.c b/code/games/minimal/src/main.c
index 7caafe3..4196a6f 100644
--- a/code/games/minimal/src/main.c
+++ b/code/games/minimal/src/main.c
@@ -1,82 +1,5 @@
-#define ZPL_IMPL
-#include "zpl.h"
-#include "platform/system.h"
-#include "core/game.h"
-#include "models/entity.h"
-#include "world/entity_view.h"
-#include "utils/options.h"
-#include "platform/signal_handling.h"
-#include "platform/profiler.h"
+typedef int efd_main;
 
-#include "flecs.h"
-#include "flecs/flecs_os_api_stdcpp.h"
-
-#include "models/components.h"
-#include "systems/systems.h"
-
-#include "platform/arch.h"
-
-#define DEFAULT_WORLD_SEED 302097
-#define DEFAULT_CHUNK_SIZE 16 /* amount of blocks within a chunk (single axis) */
-#define DEFAULT_WORLD_SIZE 5 /* amount of chunks within a world (single axis) */
-
-int main(int argc, char** argv) {
-    zpl_opts opts={0};
-    zpl_opts_init(&opts, zpl_heap(), argv[0]);
-
-    zpl_opts_add(&opts, "?", "help", "the HELP section", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "v", "viewer-only", "run viewer-only client", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "d", "server-only", "run dedicated server", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "p", "preview-map", "draw world preview", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "s", "seed", "world seed", ZPL_OPTS_INT);
-    zpl_opts_add(&opts, "r", "random-seed", "generate random world seed", ZPL_OPTS_FLAG);
-    //zpl_opts_add(&opts, "cs", "chunk-size", "amount of blocks within a chunk (single axis)", ZPL_OPTS_INT);
-    zpl_opts_add(&opts, "ws", "world-size", "amount of chunks within a world (single axis)", ZPL_OPTS_INT);
-    zpl_opts_add(&opts, "ip", "host", "host IP address", ZPL_OPTS_STRING);
-    zpl_opts_add(&opts, "port", "port", "port number", ZPL_OPTS_INT);
-
-    uint32_t ok = zpl_opts_compile(&opts, argc, argv);
-
-    if (!ok) {
-        zpl_opts_print_errors(&opts);
-        zpl_opts_print_help(&opts);
-        return -1;
-    }
-
-    int8_t is_viewer_only = zpl_opts_has_arg(&opts, "viewer-only");
-    int8_t is_server_only = zpl_opts_has_arg(&opts, "server-only");
-    int32_t seed = (int32_t)zpl_opts_integer(&opts, "seed", DEFAULT_WORLD_SEED);
-    uint16_t world_size = (uint16_t)zpl_opts_integer(&opts, "world-size", DEFAULT_WORLD_SIZE);
-    uint16_t chunk_size = DEFAULT_CHUNK_SIZE; //zpl_opts_integer(&opts, "chunk-size", DEFAULT_CHUNK_SIZE);
-    zpl_string host = zpl_opts_string(&opts, "host", NULL);
-    uint16_t port = (uint16_t)zpl_opts_integer(&opts, "port", 0);
-
-    game_kind play_mode = GAMEKIND_SINGLE;
-
-    if (is_viewer_only) play_mode = GAMEKIND_CLIENT;
-    if (is_server_only) play_mode = GAMEKIND_HEADLESS;
-
-    if (zpl_opts_has_arg(&opts, "random-seed")) {
-        zpl_random rnd={0};
-        zpl_random_init(&rnd);
-        seed = zpl_random_gen_u32(&rnd);
-        zpl_printf("Seed: %u\n", seed);
-    }
-
-    if (zpl_opts_has_arg(&opts, "preview-map")) {
-        generate_minimap(seed, WORLD_BLOCK_SIZE, chunk_size, world_size);
-        return 0;
-    }
-
-    sighandler_register();
-    game_init(host, port, play_mode, 1, seed, chunk_size, world_size, 0);
-
-    game_run();
-
-    game_shutdown();
-    sighandler_unregister();
-
-    zpl_string_free(host);
-    zpl_opts_free(&opts);
+efd_main start() {
     return 0;
 }
diff --git a/code/games/minimal/src/oldmain.c b/code/games/minimal/src/oldmain.c
new file mode 100644
index 0000000..7caafe3
--- /dev/null
+++ b/code/games/minimal/src/oldmain.c
@@ -0,0 +1,82 @@
+#define ZPL_IMPL
+#include "zpl.h"
+#include "platform/system.h"
+#include "core/game.h"
+#include "models/entity.h"
+#include "world/entity_view.h"
+#include "utils/options.h"
+#include "platform/signal_handling.h"
+#include "platform/profiler.h"
+
+#include "flecs.h"
+#include "flecs/flecs_os_api_stdcpp.h"
+
+#include "models/components.h"
+#include "systems/systems.h"
+
+#include "platform/arch.h"
+
+#define DEFAULT_WORLD_SEED 302097
+#define DEFAULT_CHUNK_SIZE 16 /* amount of blocks within a chunk (single axis) */
+#define DEFAULT_WORLD_SIZE 5 /* amount of chunks within a world (single axis) */
+
+int main(int argc, char** argv) {
+    zpl_opts opts={0};
+    zpl_opts_init(&opts, zpl_heap(), argv[0]);
+
+    zpl_opts_add(&opts, "?", "help", "the HELP section", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "v", "viewer-only", "run viewer-only client", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "d", "server-only", "run dedicated server", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "p", "preview-map", "draw world preview", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "s", "seed", "world seed", ZPL_OPTS_INT);
+    zpl_opts_add(&opts, "r", "random-seed", "generate random world seed", ZPL_OPTS_FLAG);
+    //zpl_opts_add(&opts, "cs", "chunk-size", "amount of blocks within a chunk (single axis)", ZPL_OPTS_INT);
+    zpl_opts_add(&opts, "ws", "world-size", "amount of chunks within a world (single axis)", ZPL_OPTS_INT);
+    zpl_opts_add(&opts, "ip", "host", "host IP address", ZPL_OPTS_STRING);
+    zpl_opts_add(&opts, "port", "port", "port number", ZPL_OPTS_INT);
+
+    uint32_t ok = zpl_opts_compile(&opts, argc, argv);
+
+    if (!ok) {
+        zpl_opts_print_errors(&opts);
+        zpl_opts_print_help(&opts);
+        return -1;
+    }
+
+    int8_t is_viewer_only = zpl_opts_has_arg(&opts, "viewer-only");
+    int8_t is_server_only = zpl_opts_has_arg(&opts, "server-only");
+    int32_t seed = (int32_t)zpl_opts_integer(&opts, "seed", DEFAULT_WORLD_SEED);
+    uint16_t world_size = (uint16_t)zpl_opts_integer(&opts, "world-size", DEFAULT_WORLD_SIZE);
+    uint16_t chunk_size = DEFAULT_CHUNK_SIZE; //zpl_opts_integer(&opts, "chunk-size", DEFAULT_CHUNK_SIZE);
+    zpl_string host = zpl_opts_string(&opts, "host", NULL);
+    uint16_t port = (uint16_t)zpl_opts_integer(&opts, "port", 0);
+
+    game_kind play_mode = GAMEKIND_SINGLE;
+
+    if (is_viewer_only) play_mode = GAMEKIND_CLIENT;
+    if (is_server_only) play_mode = GAMEKIND_HEADLESS;
+
+    if (zpl_opts_has_arg(&opts, "random-seed")) {
+        zpl_random rnd={0};
+        zpl_random_init(&rnd);
+        seed = zpl_random_gen_u32(&rnd);
+        zpl_printf("Seed: %u\n", seed);
+    }
+
+    if (zpl_opts_has_arg(&opts, "preview-map")) {
+        generate_minimap(seed, WORLD_BLOCK_SIZE, chunk_size, world_size);
+        return 0;
+    }
+
+    sighandler_register();
+    game_init(host, port, play_mode, 1, seed, chunk_size, world_size, 0);
+
+    game_run();
+
+    game_shutdown();
+    sighandler_unregister();
+
+    zpl_string_free(host);
+    zpl_opts_free(&opts);
+    return 0;
+}
diff --git a/code/games/survival/CMakeLists.txt b/code/games/survival/CMakeLists.txt
index cca030d..389087c 100644
--- a/code/games/survival/CMakeLists.txt
+++ b/code/games/survival/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_executable(survival
-    src/main.c
+    src/oldmain.c
     src/platform.c
     src/worldgen.c
     src/texgen.c
diff --git a/code/games/survival/src/main.c b/code/games/survival/src/main.c
index 4c94411..8465ade 100644
--- a/code/games/survival/src/main.c
+++ b/code/games/survival/src/main.c
@@ -1,101 +1,321 @@
-#define ZPL_IMPL
-#include "zpl.h"
-#include "platform/system.h"
-#include "core/game.h"
-#include "game.h"
-#include "models/entity.h"
-#include "world/entity_view.h"
-#include "utils/options.h"
-#include "platform/signal_handling.h"
-#include "platform/profiler.h"
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
 
-#include "flecs.h"
-#include "flecs/flecs_os_api_stdcpp.h"
+/// lib.c
 
-#include "models/components.h"
-#include "systems/systems.h"
+// core
 
-#include "platform/arch.h"
+typedef int efd_app;
+typedef uint16_t efd_entity_type;
+typedef int32_t efd_result;
+typedef uint64_t efd_entity;
 
-ZPL_DIAGNOSTIC_PUSH_WARNLEVEL(0)
-#include "tinyc2.h"
-ZPL_DIAGNOSTIC_POP
+typedef enum efd_asset_type {
+    // EFD_ASSET_NONE = 0,
+    EFD_ASSET_TEXTURE,
+    EFD_ASSET_ANIMATION,
+    EFD_ASSET_SOUND,
+    EFD_ASSET_FONT,
+    EFD_ASSET_SHADER,
+    EFD_ASSET_COUNT_TYPES,
+} efd_asset_type;
 
-#define DEFAULT_WORLD_SEED 302097
-#define DEFAULT_CHUNK_SIZE 16 /* amount of blocks within a chunk (single axis) */
-#define DEFAULT_WORLD_SIZE 5 /* amount of chunks within a world (single axis) */
+typedef struct efd_app_desc {
+    const char *name;
+    int debug_ui;
 
-/*
-	TODO
-	- monster spawner
-	- the longer we survive, the more and stronger enemies we spawn
-	- player grows HP by leveling up
-	- XP increases by killing mobs
-	- player can pick an "ability" upon reaching level milestones
-	- abilities: armor/shield, TODO ...
-	- enemies damage player when close to him in ticks (damage effects, ...)
-	- basic projectile pooling (flecs)
-	- somewhat believable world gen, small hamlets with cols, etc
-*/
+    int width;
+    int height;
+    int fullscreen;
+    int vsync;
 
+    int server_only;
+    int viewer_only;
+    int viewer_amount;
+    int world_seed;
+    int world_seed_random;
 
-int main(int argc, char** argv) {
-    zpl_opts opts={0};
-    zpl_opts_init(&opts, zpl_heap(), argv[0]);
+    efd_result (*init_cb)();
+    efd_result (*update_cb)();
+    efd_result (*render_cb)(efd_entity_type type);
+    efd_result (*player_join_cb)(efd_entity player_id);
+    efd_result (*player_leave_cb)(efd_entity player_id);
+    efd_result (*cleanup_cb)();
 
-    zpl_opts_add(&opts, "?", "help", "the HELP section", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "v", "viewer-only", "run viewer-only client", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "d", "server-only", "run dedicated server", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "p", "preview-map", "draw world preview", ZPL_OPTS_FLAG);
-    zpl_opts_add(&opts, "s", "seed", "world seed", ZPL_OPTS_INT);
-    zpl_opts_add(&opts, "r", "random-seed", "generate random world seed", ZPL_OPTS_FLAG);
-    //zpl_opts_add(&opts, "cs", "chunk-size", "amount of blocks within a chunk (single axis)", ZPL_OPTS_INT);
-    zpl_opts_add(&opts, "ws", "world-size", "amount of chunks within a world (single axis)", ZPL_OPTS_INT);
-    zpl_opts_add(&opts, "ip", "host", "host IP address", ZPL_OPTS_STRING);
-    zpl_opts_add(&opts, "port", "port", "port number", ZPL_OPTS_INT);
+    struct {
+        float item_pickup_radius;
+        float item_merge_radius;
+        float item_drop_radius;
+        float item_attract_radius;
+        float item_attract_force;
+    } rules;
+} efd_app_desc;
 
-    uint32_t ok = zpl_opts_compile(&opts, argc, argv);
+// assets
 
-    if (!ok) {
-        zpl_opts_print_errors(&opts);
-        zpl_opts_print_help(&opts);
-        return -1;
+// #define EFD_ASSET_TEXTURE_LAST 15
+// #define EFD_ASSET_ANIMATION_LAST 2222222
+// #define EFD_ASSET_ANIMATION_LAST 2222222
+
+// #define CONC(a, b) a##b
+/*  + CONC(type, _LAST) */
+
+#define EFD_ASSET_SHIFT 16
+#define EFD_ASSET(type) ((type) << EFD_ASSET_SHIFT)
+#define EFD_ASSET_TYPE(id) ((id) >> EFD_ASSET_SHIFT)
+
+typedef struct efd_asset {
+    int id;
+    const char *path;
+    void *data; /* TODO: make a union */
+} efd_asset;
+
+efd_result efd_asset_add(int id, const char *path);
+efd_result efd_asset_remove(int id);
+efd_asset *efd_asset_get(int id);
+
+// notifications
+
+efd_result efd_notify_push(efd_entity actor, const char *title, const char *text, float duration);
+efd_result efd_notify_clear(efd_entity actor);
+
+// tooltips
+
+efd_result efd_tooltip_add(const char *name, const char *text);
+efd_result efd_tooltip_remove(const char *name);
+
+// entities
+
+enum efd_entity_type_builtins {
+    EFD_ENTITY_NONE = 0,
+    EFD_ENTITY_PLAYER = 1,
+    EFD_ENTITY_CHUNK,
+    EFD_ENTITY_OBJECT,
+    EFD_ENTITY_ITEM,
+    EFD_ENTITY_NPC,
+    EFD_ENTITY_VEHICLE,
+
+    EFD_ENTITY_TYPE_LAST,
+    EFD_ENTITY_TYPE_MAX = 0xFFFF,
+};
+
+/// app.c
+
+enum {
+    /* textures */
+    ASSET_TILE_DIRT = EFD_ASSET(EFD_ASSET_TEXTURE),
+    ASSET_TILE_GRASS,
+    ASSET_TILE_STONE,
+
+    ASSET_BLOCK_STONE,
+    ASSET_BLOCK_BRICK,
+
+    ASSET_PLAYER,
+    ASSET_TREE,
+    ASSET_CHEST,
+    ASSET_MONSTER,
+
+    /* animations */
+    ASSET_PLAYER_ANIM = EFD_ASSET(EFD_ASSET_ANIMATION),
+
+    /* sounds */
+    ASSET_PLAYER_SOUND = EFD_ASSET(EFD_ASSET_SOUND),
+    ASSET_TREE_SOUND,
+    ASSET_CHEST_SOUND,
+
+    /* fonts */
+    ASSET_FONT_DEFAULT = EFD_ASSET(EFD_ASSET_FONT),
+};
+
+enum {
+    ENTITY_MONSTER = EFD_ENTITY_TYPE_LAST,
+    ENTITY_WEAPON,
+};
+
+void Move(ecs_iter_t *it) {
+    // Get fields from system query
+    Position *p = ecs_field(it, Position, 1);
+    Velocity *v = ecs_field(it, Velocity, 2);
+
+    // Iterate matched entities
+    for (int i = 0; i < it->count, i++) {
+        p[i].x += v[i].x;
+        p[i].y += v[i].y;
+    }
+}
+
+efd_result init() {
+    // register assets
+    {
+        // register textures (tiles)
+        efd_asset_add(ASSET_TILE_DIRT, "assets/tile_dirt.png");
+        efd_asset_add(ASSET_TILE_GRASS, "assets/tilegrass.png");
+        efd_asset_add(ASSET_TILE_STONE, "assets/tilestone.png");
+
+        // register textures (blocks)
+        efd_asset_add(ASSET_BLOCK_STONE, "assets/block_stone.png");
+        efd_asset_add(ASSET_BLOCK_BRICK, "assets/block_brick.png");
+
+        // register textures (entities)
+        efd_asset_add(ASSET_PLAYER, "assets/player.png");
+        efd_asset_add(ASSET_TREE, "assets/tree.png");
+        efd_asset_add(ASSET_CHEST, "assets/chest.png");
+        efd_asset_add(ASSET_MONSTER, "assets/monster.png");
+
+        // register animations
+        efd_asset_add(ASSET_PLAYER_ANIM, "assets/player.anim");
+
+        // register sounds
+        efd_asset_add(ASSET_PLAYER_SOUND, "assets/player.ogg");
+        efd_asset_add(ASSET_TREE_SOUND, "assets/tree.ogg");
+
+        // register fonts
+        efd_asset_add(ASSET_FONT_DEFAULT, "assets/font.ttf");
     }
 
-    int8_t is_viewer_only = zpl_opts_has_arg(&opts, "viewer-only");
-    int8_t is_server_only = zpl_opts_has_arg(&opts, "server-only");
-    int32_t seed = (int32_t)zpl_opts_integer(&opts, "seed", DEFAULT_WORLD_SEED);
-    uint16_t world_size = (uint16_t)zpl_opts_integer(&opts, "world-size", DEFAULT_WORLD_SIZE);
-    uint16_t chunk_size = DEFAULT_CHUNK_SIZE; //zpl_opts_integer(&opts, "chunk-size", DEFAULT_CHUNK_SIZE);
-    zpl_string host = zpl_opts_string(&opts, "host", NULL);
-    uint16_t port = (uint16_t)zpl_opts_integer(&opts, "port", 0);
+    // define world generation rules, load existing world
+    // or set up a custom pipeline to generate a new one
+    // efd_world_load("worlds/default.json");
 
-    game_kind play_mode = GAMEKIND_SINGLE;
+    // register tooltips
+    efd_tooltip_add("ASSET_TREE", "A tree, it's a tree, what do you expect?");
+    efd_tooltip_add("ASSET_CHEST", "A chest, it's a chest, what do you expect?");
 
-    if (is_viewer_only) play_mode = GAMEKIND_CLIENT;
-    if (is_server_only) play_mode = GAMEKIND_HEADLESS;
+    // 1. define itself
+    // 2. render itself
+    // 3. register types for sedning data
+    // 4. define systems and components
 
-    if (zpl_opts_has_arg(&opts, "random-seed")) {
-        zpl_random rnd={0};
-        zpl_random_init(&rnd);
-        seed = zpl_random_gen_u32(&rnd);
-        zpl_printf("Seed: %u\n", seed);
-    }
+    ECS_SYSTEM(efd_world(), Move, EcsOnUpdate, Position, [in] Velocity);
 
-    if (zpl_opts_has_arg(&opts, "preview-map")) {
-        generate_minimap(seed, WORLD_BLOCK_SIZE, chunk_size, world_size);
-        return 0;
-    }
+    // register game specific input bindings
+    // pre-defined bindings and controlsets
+    efd_controlset_apply(EFD_ACTION_MOVE, EFD_CONTROLSET_WASD | EFD_CONTROLSET_ARROWS | EFD_CONTROLSET_GAMEPAD_LEFT);
+    efd_controlset_apply(EFD_ACTION_POINT, EFD_CONTROLSET_MOUSE | EFD_CONTROLSET_GAMEPAD_RIGHT);
 
-    sighandler_register();
-    game_init(host, port, play_mode, 1, seed, chunk_size, world_size, 0);
-	game_setup_ecs();
-    game_run();
+    // custom bindings and controlsets
+    efd_controlset_keyboard(CONTROLSET_ACCELERATE, EFD_KEY_DOWN, EFD_KEY_SHIFT_LEFT | EFD_KEY_SHIFT_RIGHT);
+    efd_controlset_gamepad(CONTROLSET_ACCELERATE, EFD_GAMEPAD_LEFT_TRIGGER, 0.5f);
+    efd_controlset_apply(EFD_ACTION_SPRINT, CONTROLSET_ACCERLATE);
 
-    game_shutdown();
-    sighandler_unregister();
+    // custom input bindings for custom actions
+    efd_controlset_register(ACTION_USE);
+    efd_controlset_keyboard(CONTROLSET_USE, EFD_KEY_DOWN, EFD_KEY_E);
+    efd_controlset_gamepad(CONTROLSET_USE, EFD_GAMEPAD_BUTTON_A, 0.5f);
+    efd_controlset_apply(ACTION_USE, CONTROLSET_USE);
+
+    return 0;
+}
+
+efd_result update() {
+    return 0;
+}
+
+efd_result render(efd_entity_type type) {
+    switch (type) {
+        case EFD_ENTITY_PLAYER:
+            /* additional/replacable rendering code on top of what EFD provides for built-in types */
+            efd_render_texture(ASSET_PLAYER, 0, 0, 0, 0, 0, 0, 0, 0);
+
+            return 1; /* we handled the rendering, don't render with the default renderer */
+            break;
+
+        case ENTITY_MONSTER:
+            /* our custom rendering code for monster */
+            efd_render_texture(ASSET_MONSTER, 0, 0, 0, 0, 0, 0, 0, 0);
+            break;
+
+        case ENTITY_WEAPON:
+            /* our custom rendering code for weapon */
+            break;
+    }
+
+    return 0;
+}
+
+efd_result player_join(efd_entity player) {
+    efd_notify_push(player, "Test", "Welcome to the game!", 5.0f);
+    return 0;
+}
+
+efd_result player_leave(efd_entity player) {
+    return 0;
+}
+
+efd_result cleanup() {
+    return 0;
+}
+
+efd_app_desc efd_main() {
+    return (efd_app_desc){
+        .name = "Survival",
+        .debug_ui = true,
+
+        /* these are defaults, with zpl_option/config files overrides */
+        .width = 1280,
+        .height = 720,
+        .fullscreen = 0,
+        .vsync = 1,
+
+        /* these are code overrides for zpl_option flags (not defaults) */
+        .server_only = false,
+        .viewer_only = false,
+        .viewer_amount = 1,
+        .world_seed = 0,
+        .world_seed_random = true,
+
+        /* primary callbacks */
+        .init_cb = init,
+        .update_cb = update,
+        .render_cb = render,
+        .player_join_cb = player_join,
+        .player_leave_cb = player_leave,
+        .cleanup_cb = cleanup,
+
+        .rules = {
+            .item_pickup_radius = 25.0f,
+            .item_merge_radius = 75.0f,
+            .item_drop_radius = 15.0f,
+            .item_attract_radius = 75.0f,
+            .item_attract_force = 0.1f,
+        },
+    };
+}
+
+/// test.c
+
+#include <stdio.h>
+
+efd_result efd_asset_add(int id, const char *path) {
+    printf("asset_add: %d, %s\n", id, path);
+    return 0;
+}
+
+efd_result efd_tooltip_add(const char *id, const char *text) {
+    printf("tooltip_add: %s, %s\n", id, text);
+    return 0;
+}
+
+efd_result efd_notify_push(efd_entity player, const char *title, const char *text, float duration) {
+    printf("notify_push: %llu, %s, %s, %f\n", player, title, text, duration);
+    return 0;
+}
+
+void test(efd_entity_type type) { printf("type: %d\n", type); }
+
+int main(int argc, char **argv) {
+    efd_app_desc desc = efd_main();
+    printf("value: %f\n", desc.rules.item_pickup_radius);
+    printf("ASSET_TILE_DIRT: %d\n", ASSET_TILE_DIRT);
+    printf("ASSET_TILE_GRASS: %d\n", ASSET_TILE_GRASS);
+    printf("ASSET_PLAYER: %d\n", ASSET_PLAYER);
+    printf("ASSET_CHEST: %d\n", ASSET_CHEST);
+    printf("ASSET_PLAYER_ANIM: %d\n", ASSET_PLAYER_ANIM);
+    printf("ASSET_PLAYER_SOUND: %d\n", ASSET_PLAYER_SOUND);
+    printf("ASSET_TREE_SOUND: %d\n", ASSET_TREE_SOUND);
+
+    desc.init_cb();
 
-    zpl_string_free(host);
-    zpl_opts_free(&opts);
     return 0;
 }
diff --git a/code/games/survival/src/oldmain.c b/code/games/survival/src/oldmain.c
new file mode 100644
index 0000000..4c94411
--- /dev/null
+++ b/code/games/survival/src/oldmain.c
@@ -0,0 +1,101 @@
+#define ZPL_IMPL
+#include "zpl.h"
+#include "platform/system.h"
+#include "core/game.h"
+#include "game.h"
+#include "models/entity.h"
+#include "world/entity_view.h"
+#include "utils/options.h"
+#include "platform/signal_handling.h"
+#include "platform/profiler.h"
+
+#include "flecs.h"
+#include "flecs/flecs_os_api_stdcpp.h"
+
+#include "models/components.h"
+#include "systems/systems.h"
+
+#include "platform/arch.h"
+
+ZPL_DIAGNOSTIC_PUSH_WARNLEVEL(0)
+#include "tinyc2.h"
+ZPL_DIAGNOSTIC_POP
+
+#define DEFAULT_WORLD_SEED 302097
+#define DEFAULT_CHUNK_SIZE 16 /* amount of blocks within a chunk (single axis) */
+#define DEFAULT_WORLD_SIZE 5 /* amount of chunks within a world (single axis) */
+
+/*
+	TODO
+	- monster spawner
+	- the longer we survive, the more and stronger enemies we spawn
+	- player grows HP by leveling up
+	- XP increases by killing mobs
+	- player can pick an "ability" upon reaching level milestones
+	- abilities: armor/shield, TODO ...
+	- enemies damage player when close to him in ticks (damage effects, ...)
+	- basic projectile pooling (flecs)
+	- somewhat believable world gen, small hamlets with cols, etc
+*/
+
+
+int main(int argc, char** argv) {
+    zpl_opts opts={0};
+    zpl_opts_init(&opts, zpl_heap(), argv[0]);
+
+    zpl_opts_add(&opts, "?", "help", "the HELP section", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "v", "viewer-only", "run viewer-only client", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "d", "server-only", "run dedicated server", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "p", "preview-map", "draw world preview", ZPL_OPTS_FLAG);
+    zpl_opts_add(&opts, "s", "seed", "world seed", ZPL_OPTS_INT);
+    zpl_opts_add(&opts, "r", "random-seed", "generate random world seed", ZPL_OPTS_FLAG);
+    //zpl_opts_add(&opts, "cs", "chunk-size", "amount of blocks within a chunk (single axis)", ZPL_OPTS_INT);
+    zpl_opts_add(&opts, "ws", "world-size", "amount of chunks within a world (single axis)", ZPL_OPTS_INT);
+    zpl_opts_add(&opts, "ip", "host", "host IP address", ZPL_OPTS_STRING);
+    zpl_opts_add(&opts, "port", "port", "port number", ZPL_OPTS_INT);
+
+    uint32_t ok = zpl_opts_compile(&opts, argc, argv);
+
+    if (!ok) {
+        zpl_opts_print_errors(&opts);
+        zpl_opts_print_help(&opts);
+        return -1;
+    }
+
+    int8_t is_viewer_only = zpl_opts_has_arg(&opts, "viewer-only");
+    int8_t is_server_only = zpl_opts_has_arg(&opts, "server-only");
+    int32_t seed = (int32_t)zpl_opts_integer(&opts, "seed", DEFAULT_WORLD_SEED);
+    uint16_t world_size = (uint16_t)zpl_opts_integer(&opts, "world-size", DEFAULT_WORLD_SIZE);
+    uint16_t chunk_size = DEFAULT_CHUNK_SIZE; //zpl_opts_integer(&opts, "chunk-size", DEFAULT_CHUNK_SIZE);
+    zpl_string host = zpl_opts_string(&opts, "host", NULL);
+    uint16_t port = (uint16_t)zpl_opts_integer(&opts, "port", 0);
+
+    game_kind play_mode = GAMEKIND_SINGLE;
+
+    if (is_viewer_only) play_mode = GAMEKIND_CLIENT;
+    if (is_server_only) play_mode = GAMEKIND_HEADLESS;
+
+    if (zpl_opts_has_arg(&opts, "random-seed")) {
+        zpl_random rnd={0};
+        zpl_random_init(&rnd);
+        seed = zpl_random_gen_u32(&rnd);
+        zpl_printf("Seed: %u\n", seed);
+    }
+
+    if (zpl_opts_has_arg(&opts, "preview-map")) {
+        generate_minimap(seed, WORLD_BLOCK_SIZE, chunk_size, world_size);
+        return 0;
+    }
+
+    sighandler_register();
+    game_init(host, port, play_mode, 1, seed, chunk_size, world_size, 0);
+	game_setup_ecs();
+    game_run();
+
+    game_shutdown();
+    sighandler_unregister();
+
+    zpl_string_free(host);
+    zpl_opts_free(&opts);
+    return 0;
+}
diff --git a/foundation.md b/foundation.md
new file mode 100644
index 0000000..4f9f0dd
--- /dev/null
+++ b/foundation.md
@@ -0,0 +1,64 @@
+foundation:
+    * platform
+    * viewer system ??
+    * camera
+    * game
+    * debug ui
+    * packet utils
+    * arch
+    * input
+    * profiler
+    * renderer
+    * signal handling
+    * zpl options
+    * gen/textgen -> assets
+    * items
+    * inventory
+    * crafting
+    * notifications
+    * tooltips
+    * chunk
+    * blocks
+    * tiles (and chunk baker)
+    * systems (core systems)
+    * components
+    * net
+    * packets (but add custom messaging, and security)
+    * compression
+    * world
+    * wrold_view
+    * entity_view
+
+
+-------
+app - thing that runs game
+game - the game stuff, includes client and server
+packet - structure that has data written/read by client/server
+asset - structure that describes tile/block/object/entity, something that can be visualized
+module - a thing that uses a set of ecs components and systems to create a self-contained ecs module
+------------
+world - a map of chunks within the game world
+world-view - a representation of the world recreated by the client
+----------
+tile - basic thing that makes up the chunks
+block - 2nd level of things that make up the chunk
+chunk - entity that contains set of tiles and blocks
+object - an grid-independant static entity that can exist in the world
+entity - a dynamic object that can change position within the world
+item - an entity in the world, that can have a different state when its picked up
+
+
+zpl.eco
+    foundation
+    sandbox
+    survival
+
+prefix: efd_
+
+
+entity
+    * objects
+    * players
+    * nps
+    * vehicles
+    * items