diff --git a/pkg/ant.hwi/service/bgfx.lua b/pkg/ant.hwi/service/bgfx.lua
index 0fd1851b37..ada93b5ddf 100644
--- a/pkg/ant.hwi/service/bgfx.lua
+++ b/pkg/ant.hwi/service/bgfx.lua
@@ -347,8 +347,8 @@ function S.maxfps(v)
         maxfps = v
     end
     if platform.os == "ios" then
-        local ServiceWindow = ltask.queryservice "ant.window|ios"
-        ltask.call(ServiceWindow, "maxfps", maxfps)
+        local ServiceWindow = ltask.queryservice "ant.window|window"
+        ltask.call(ServiceWindow, "set_maxfps", maxfps)
     end
     return maxfps
 end
diff --git a/pkg/ant.window/service/ios.lua b/pkg/ant.window/service/ios.lua
index 8447d537d9..b6770cf908 100644
--- a/pkg/ant.window/service/ios.lua
+++ b/pkg/ant.window/service/ios.lua
@@ -4,18 +4,11 @@ local window = require "window.ios"
 
 local scheduling = exclusive.scheduling()
 local SCHEDULE_SUCCESS <const> = 3
-local CALL = false
+
 local function update()
-    ltask.wakeup "update"
     repeat
         scheduling()
     until ltask.schedule_message() ~= SCHEDULE_SUCCESS
-    while CALL do
-        exclusive.sleep(1)
-        repeat
-            scheduling()
-        until ltask.schedule_message() ~= SCHEDULE_SUCCESS
-    end
 end
 window.init({}, update)
 ltask.fork(function()
@@ -24,8 +17,4 @@ ltask.fork(function()
 end)
 
 local S = {}
-
-function S.maxfps(fps)
-end
-
 return S
diff --git a/pkg/ant.window/service/window.lua b/pkg/ant.window/service/window.lua
index c47d495536..7930773c33 100644
--- a/pkg/ant.window/service/window.lua
+++ b/pkg/ant.window/service/window.lua
@@ -1,28 +1,191 @@
-local platform = require "bee.platform"
-local world_instance = require "world_instance"
+local ltask     = require "ltask"
+local bgfx      = require "bgfx"
+local window    = require "window"
+local assetmgr  = import_package "ant.asset"
+local audio     = import_package "ant.audio"
+local new_world = import_package "ant.world".new_world
+local rhwi      = import_package "ant.hwi"
 
-world_instance.init(...)
+rhwi.init_bgfx()
+
+local ServiceRmlUi
+ltask.fork(function ()
+    ServiceRmlUi = ltask.uniqueservice("ant.rmlui|rmlui", ltask.self())
+end)
+
+local world
+local WillReboot
+local initargs = ...
+
+local WindowQueue = {}
+local WindowQuit
+local WindowToken = {}
+local WindowEvent = {}
+
+local function reboot(args)
+    local config = world.args
+    config.REBOOT = true
+    config.ecs = args
+    world:pipeline_exit()
+    world = new_world(config)
+    world:pipeline_init()
+end
+
+local function render(init, args, initialized)
+    local config = {
+        ecs = args,
+        window = init.window,
+        nwh = init.nwh,
+        context = init.context,
+        width = init.w,
+        height = init.h,
+    }
+    rhwi.init {
+        window  = config.window,
+        nwh     = config.nwh,
+        context = config.context,
+        w       = config.width,
+        h       = config.height,
+    }
+    rhwi.set_profie(false)
+    bgfx.encoder_create "world"
+    bgfx.encoder_init()
+    assetmgr.init()
+    bgfx.encoder_begin()
+    world = new_world(config)
+    world:dispatch_message {
+        type = "set_viewport",
+        viewport = {
+            x = 0,
+            y = 0,
+            w = config.width,
+            h = config.height,
+        },
+    }
+    world:dispatch_message { type = "update" }
+    world:pipeline_init()
+    bgfx.encoder_end()
+
+    ltask.wakeup(initialized)
+    initialized = nil
+
+    while true do
+        window.peek_message()
+        if #WindowQueue > 0 then
+            ltask.wakeup(WindowToken)
+        end
+        world:dispatch_message { type = "update" }
+        if WindowQuit then
+            break
+        end
+        bgfx.encoder_begin()
+        if WillReboot then
+            reboot(WillReboot)
+            WillReboot = nil
+        end
+        world:pipeline_update()
+        bgfx.encoder_end()
+        audio.frame()
+        world._frametime = bgfx.encoder_frame()
+    end
+    if ServiceRmlUi then
+        ltask.send(ServiceRmlUi, "shutdown")
+        ServiceRmlUi = nil
+    end
+    world:pipeline_exit()
+    world = nil
+    bgfx.encoder_destroy()
+    rhwi.shutdown()
+    ltask.wakeup(WindowQuit)
+end
+
+function WindowEvent.init(m)
+    local initialized = {}
+    ltask.fork(render, m, initargs, initialized)
+    ltask.wait(initialized)
+end
+
+function WindowEvent.recreate(m)
+    bgfx.set_platform_data {
+        nwh = m.nwh
+    }
+    world:dispatch_message {
+        type = "size",
+        w = m.w,
+        h = m.h,
+    }
+end
+
+local PAUSE
+function WindowEvent.suspend(m)
+    if m.what == "will_suspend" then
+        bgfx.pause()
+        PAUSE = true
+        ltask.fork(function ()
+            local thread = require "bee.thread"
+            while PAUSE do
+                window.peek_message()
+                if #WindowQueue > 0 then
+                    ltask.wakeup(WindowToken)
+                    ltask.sleep(0)
+                else
+                    thread.sleep(0.01)
+                end
+            end
+        end)
+    elseif m.what == "did_resume" then
+        bgfx.continue()
+        PAUSE = nil
+    end
+end
+
+function WindowEvent.exit()
+    WindowQuit = {}
+    ltask.wait(WindowQuit)
+    print "exit"
+    ltask.multi_wakeup "quit"
+end
+
+ltask.fork(function ()
+    while not WindowQuit do
+        while true do
+            local msg = table.remove(WindowQueue, 1)
+            if not msg then
+                break
+            end
+            local f = WindowEvent[msg.type]
+            if f then
+                f(msg)
+            elseif not world:dispatch_imgui(msg) then
+                world:dispatch_message(msg)
+            end
+        end
+        ltask.wait(WindowToken)
+    end
+end)
+
+local function table_append(t, a)
+    table.move(a, 1, #a, #t+1, t)
+end
 
 local S = {}
 
 function S.reboot(args)
-    world_instance.reboot(args)
+    WillReboot = args
 end
 
 function S.wait()
-    world_instance.wait()
+    ltask.multi_wait "quit"
 end
 
 function S.msg(messages)
-    world_instance.message(messages)
-end
-
-if platform.os == "ios" then
-    return S
+    local wakeup = #WindowQueue == 0
+    table_append(WindowQueue, messages)
+    if wakeup then
+        ltask.wakeup(WindowToken)
+    end
 end
 
-local window = require "window"
-
 function S.set_cursor(cursor)
     window.set_cursor(cursor)
 end
@@ -31,10 +194,10 @@ function S.set_title(title)
     window.set_title(title)
 end
 
-function S.maxfps(fps)
-    if window.maxfps then
-        window.maxfps(fps)
-    end
+function S.set_maxfps(fps)
+    window.set_maxfps(fps)
 end
 
+window.init(WindowQueue, initargs.window_size)
+
 return S
diff --git a/pkg/ant.window/src/luabind.cpp b/pkg/ant.window/src/luabind.cpp
index ff9ea139a9..fc42fb9929 100644
--- a/pkg/ant.window/src/luabind.cpp
+++ b/pkg/ant.window/src/luabind.cpp
@@ -7,24 +7,12 @@ static bee::zstring_view lua_checkstrview(lua_State* L, int idx) {
 	return { str, sz };
 }
 
-#if !defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__)
-static int MessageFetch(lua_State* L) {
-	lua_seti(L, 1, luaL_len(L, 1)+1);
-	lua_settop(L, 1);
-	return 0;
-}
-#endif
-
 static int init(lua_State *L) {
 	lua_State* messageL = lua_newthread(L);
 	lua_setfield(L, LUA_REGISTRYINDEX, "ANT_WINDOW_CONTEXT");
 	lua_pushvalue(L, 1);
 	lua_xmove(L, messageL, 1);
 
-#if !defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__)
-	window_message_set_fetch_func(MessageFetch);
-#endif
-
 	const char* size = lua_tostring(L, 2);
 	bool ok = window_init(messageL, size);
 	if (!ok) {
@@ -55,9 +43,9 @@ static int set_title(lua_State* L) {
 	return 0;
 }
 
-static int maxfps(lua_State *L) {
+static int set_maxfps(lua_State *L) {
 	float fps = (float)luaL_checknumber(L, 1);
-	window_maxfps(fps);
+	window_set_maxfps(fps);
 	return 0;
 }
 
@@ -70,7 +58,7 @@ luaopen_window(lua_State *L) {
 		{ "peek_message", peek_message },
 		{ "set_cursor", set_cursor },
 		{ "set_title", set_title },
-		{ "maxfps", maxfps },
+		{ "set_maxfps", set_maxfps },
 		{ NULL, NULL },
 	};
 	luaL_newlib(L, l);
diff --git a/pkg/ant.window/src/platform/ios/ios_window.mm b/pkg/ant.window/src/platform/ios/ios_window.mm
index 6868da0a0f..83f0b21190 100644
--- a/pkg/ant.window/src/platform/ios/ios_window.mm
+++ b/pkg/ant.window/src/platform/ios/ios_window.mm
@@ -228,10 +228,9 @@ void select(std::function<void(void*)> handler) {
 
 static MessageQueue g_msqueue;
 
-static int MessageFetch(lua_State* L) {
+static void MessageFetch(lua_State* L) {
     g_msqueue.push(seri_pack(L, 0, NULL));
     lua_settop(L, 0);
-    return 0;
 }
 
 void loopwindow_init(struct ant_window_callback* cb) {
@@ -285,7 +284,7 @@ void window_set_cursor(int cursor) {
 void window_set_title(bee::zstring_view title) {
 }
 
-void window_maxfps(float fps) {
+void window_set_maxfps(float fps) {
     //TODO
     //if (global_window) {
     //    [global_window maxfps: fps];
diff --git a/pkg/ant.window/src/platform/ios/luabind.cpp b/pkg/ant.window/src/platform/ios/luabind.cpp
index c606e4a70c..b3b113543d 100644
--- a/pkg/ant.window/src/platform/ios/luabind.cpp
+++ b/pkg/ant.window/src/platform/ios/luabind.cpp
@@ -48,20 +48,12 @@ lmainloop(lua_State *L) {
 	return 0;
 }
 
-static int
-lmaxfps(lua_State *L) {
-	float fps = (float)luaL_checknumber(L, 1);
-	window_maxfps(fps);
-	return 0;
-}
-
 extern "C" int
 luaopen_window_ios(lua_State *L) {
 	luaL_checkversion(L);
 	luaL_Reg l[] = {
 		{ "init", linit },
 		{ "mainloop", lmainloop },
-		{ "maxfps", lmaxfps },
 		{ NULL, NULL },
 	};
 	luaL_newlib(L, l);
diff --git a/pkg/ant.window/src/platform/osx/osx_window.mm b/pkg/ant.window/src/platform/osx/osx_window.mm
index 631f37dd22..0a07ca7a66 100644
--- a/pkg/ant.window/src/platform/osx/osx_window.mm
+++ b/pkg/ant.window/src/platform/osx/osx_window.mm
@@ -399,5 +399,5 @@ void window_set_title(bee::zstring_view title) {
     //TODO
 }
 
-void window_maxfps(float fps) {
+void window_set_maxfps(float fps) {
 }
diff --git a/pkg/ant.window/src/platform/windows/win32_window.cpp b/pkg/ant.window/src/platform/windows/win32_window.cpp
index 348cc6ee3e..4b5eaa6597 100644
--- a/pkg/ant.window/src/platform/windows/win32_window.cpp
+++ b/pkg/ant.window/src/platform/windows/win32_window.cpp
@@ -612,5 +612,5 @@ void window_set_title(bee::zstring_view title) {
     ::SetWindowTextW(G.hWnd, bee::win::u2w(title).c_str());
 }
 
-void window_maxfps(float fps) {
+void window_set_maxfps(float fps) {
 }
diff --git a/pkg/ant.window/src/window.cpp b/pkg/ant.window/src/window.cpp
index 1d2f60686f..dd97726493 100644
--- a/pkg/ant.window/src/window.cpp
+++ b/pkg/ant.window/src/window.cpp
@@ -194,8 +194,13 @@ static void push_message_args(lua_State*L, K&& k, V&& v, Args&&... args) {
 	}
 }
 
-static lua_CFunction MessageFetch = NULL;
-void window_message_set_fetch_func(lua_CFunction func) {
+static void DefaultMessageFetch(lua_State* L) {
+	lua_seti(L, 1, luaL_len(L, 1)+1);
+	lua_settop(L, 1);
+}
+
+static void (*MessageFetch)(lua_State*) = DefaultMessageFetch;
+void window_message_set_fetch_func(void (*func)(lua_State*)) {
 	MessageFetch = func;
 }
 
diff --git a/pkg/ant.window/src/window.h b/pkg/ant.window/src/window.h
index 8682c6f206..239a71991c 100644
--- a/pkg/ant.window/src/window.h
+++ b/pkg/ant.window/src/window.h
@@ -16,9 +16,9 @@ void window_close();
 bool window_peek_message();
 void window_set_cursor(int cursor);
 void window_set_title(bee::zstring_view title);
-void window_maxfps(float fps);
+void window_set_maxfps(float fps);
 
-void window_message_set_fetch_func(int (*func)(lua_State*));
+void window_message_set_fetch_func(void (*func)(lua_State*));
 void window_message_init(lua_State* L, void* window, void* nwh, void* context, int w, int h);
 void window_message_recreate(lua_State* L, void* window, void* nwh, void* context, int w, int h);
 void window_message_exit(lua_State* L);
diff --git a/pkg/ant.window/world_instance.lua b/pkg/ant.window/world_instance.lua
deleted file mode 100644
index 50b4e7d501..0000000000
--- a/pkg/ant.window/world_instance.lua
+++ /dev/null
@@ -1,196 +0,0 @@
-local ltask    = require "ltask"
-local bgfx     = require "bgfx"
-local platform = require "bee.platform"
-local assetmgr = import_package "ant.asset"
-local audio    = import_package "ant.audio"
-local new_world = import_package "ant.world".new_world
-local rhwi     = import_package "ant.hwi"
-
-local window = require "window"
-
-rhwi.init_bgfx()
-
-local ServiceRmlUi
-ltask.fork(function ()
-    ServiceRmlUi = ltask.uniqueservice("ant.rmlui|rmlui", ltask.self())
-end)
-
-local world
-local WillReboot
-local initargs
-
-local WindowQueue = {}
-local WindowQuit
-local WindowToken = {}
-local WindowEvent = {}
-
-local function reboot(args)
-    local config = world.args
-    config.REBOOT = true
-    config.ecs = args
-    world:pipeline_exit()
-    world = new_world(config)
-    world:pipeline_init()
-end
-
-local function render(init, args, initialized)
-    local config = {
-        ecs = args,
-        window = init.window,
-        nwh = init.nwh,
-        context = init.context,
-        width = init.w,
-        height = init.h,
-    }
-    rhwi.init {
-        window  = config.window,
-        nwh     = config.nwh,
-        context = config.context,
-        w       = config.width,
-        h       = config.height,
-    }
-    rhwi.set_profie(false)
-    bgfx.encoder_create "world"
-    bgfx.encoder_init()
-    assetmgr.init()
-    bgfx.encoder_begin()
-    world = new_world(config)
-    world:dispatch_message {
-        type = "set_viewport",
-        viewport = {
-            x = 0,
-            y = 0,
-            w = config.width,
-            h = config.height,
-        },
-    }
-    world:dispatch_message { type = "update" }
-    world:pipeline_init()
-    bgfx.encoder_end()
-
-    ltask.wakeup(initialized)
-    initialized = nil
-
-    while true do
-        window.peek_message()
-        if #WindowQueue > 0 then
-            ltask.wakeup(WindowToken)
-        end
-        world:dispatch_message { type = "update" }
-        if WindowQuit then
-            break
-        end
-        bgfx.encoder_begin()
-        if WillReboot then
-            reboot(WillReboot)
-            WillReboot = nil
-        end
-        world:pipeline_update()
-        bgfx.encoder_end()
-        audio.frame()
-        world._frametime = bgfx.encoder_frame()
-    end
-    if ServiceRmlUi then
-        ltask.send(ServiceRmlUi, "shutdown")
-        ServiceRmlUi = nil
-    end
-    world:pipeline_exit()
-    world = nil
-    bgfx.encoder_destroy()
-    rhwi.shutdown()
-    ltask.wakeup(WindowQuit)
-end
-
-function WindowEvent.init(m)
-    local initialized = {}
-    ltask.fork(render, m, initargs, initialized)
-    ltask.wait(initialized)
-end
-
-function WindowEvent.recreate(m)
-    bgfx.set_platform_data {
-        nwh = m.nwh
-    }
-    world:dispatch_message {
-        type = "size",
-        w = m.w,
-        h = m.h,
-    }
-end
-
-local PAUSE
-function WindowEvent.suspend(m)
-    if m.what == "will_suspend" then
-        bgfx.pause()
-        PAUSE = true
-        ltask.fork(function ()
-            local thread = require "bee.thread"
-            while PAUSE do
-                window.peek_message()
-                if #WindowQueue > 0 then
-                    ltask.wakeup(WindowToken)
-                    ltask.sleep(0)
-                else
-                    thread.sleep(0.01)
-                end
-            end
-        end)
-    elseif m.what == "did_resume" then
-        bgfx.continue()
-        PAUSE = nil
-    end
-end
-
-function WindowEvent.exit()
-    WindowQuit = {}
-    ltask.wait(WindowQuit)
-    print "exit"
-    ltask.multi_wakeup "quit"
-end
-
-ltask.fork(function ()
-    while not WindowQuit do
-        while true do
-            local msg = table.remove(WindowQueue, 1)
-            if not msg then
-                break
-            end
-            local f = WindowEvent[msg.type]
-            if f then
-                f(msg)
-            elseif not world:dispatch_imgui(msg) then
-                world:dispatch_message(msg)
-            end
-        end
-        ltask.wait(WindowToken)
-    end
-end)
-
-local m = {}
-
-function m.init(args)
-    initargs = args
-    window.init(WindowQueue, initargs.window_size)
-end
-
-function m.reboot(args)
-    WillReboot = args
-end
-
-local function table_append(t, a)
-    table.move(a, 1, #a, #t+1, t)
-end
-
-function m.message(messages)
-    local wakeup = #WindowQueue == 0
-    table_append(WindowQueue, messages)
-    if wakeup then
-        ltask.wakeup(WindowToken)
-    end
-end
-
-function m.wait()
-    ltask.multi_wait "quit"
-end
-
-return m