diff --git a/funcs.lua b/funcs.lua
index 8c37d0e..77c52f4 100644
--- a/funcs.lua
+++ b/funcs.lua
@@ -87,7 +87,7 @@ end
 
 ---Round a number with specified unit
 ---@param n number
----@param u number # Default: 10
+---@param u? number # Default: 10
 ---@return number
 function math.roundUnit(n,u)
     local u = u or 10
diff --git a/main.lua b/main.lua
index 2388c1c..ad177ea 100644
--- a/main.lua
+++ b/main.lua
@@ -161,6 +161,7 @@ function love.keypressed(key, scancode)
         love.window.setFullscreen(SETTINGS["fullscreen"])
     elseif scancode == "f2" and SCENE.title ~= "Input Config" and SCENE.title ~= "Game" then
         SCENE = InputConfigScene()
+    elseif scancode == "f12" then REQUEST_BREAK()
     -- function keys are reserved
     elseif string.match(scancode, "^f[1-9]$") or string.match(scancode, "^f1[0-2]+$") then
         return
diff --git a/scene/touch_config.lua b/scene/touch_config.lua
index 9ef009d..3457c24 100644
--- a/scene/touch_config.lua
+++ b/scene/touch_config.lua
@@ -1,6 +1,28 @@
 local TouchConfigScene = SCENE:extend()
 TouchConfigScene.title = "Touchscreen config\n(you can tap anywhere on touch screen to select this)"
 
+local widgetList = {
+    BUTTON.new{
+        text = "Select widget\nLoading...",
+        x = 10, y = 10, w = 120, h = 50
+    }
+}
+local function widgetList_update()
+    for _, v in pairs(widgetList) do v:update() end
+end
+local function widgetList_draw()
+    for _, v in pairs(widgetList) do v:draw() end
+end
+local function widgetList_isHovering(x, y)
+    for _, v in pairs(widgetList) do v:isHovering(x, y) end
+end
+local function widgetList_press()
+    for _, v in pairs(widgetList) do v:press() end
+end
+local function widgetList_release()
+    for _, v in pairs(widgetList) do v:release() end
+end
+
 function TouchConfigScene:new()
     -- TODO
 end
@@ -8,38 +30,24 @@ function TouchConfigScene:update()
     -- TODO
 end
 
-local test_button = BUTTON.new{
-    name = 'PHÍM THỬ - Chọn widget',
-    x = 50, y = 50, w = 200, h = 30, textColor = {1,1,1,1},
-    codeWhenPressed  = function() PlaySE("promote") end,
-    codeWhenReleased = function() PlaySE("lock") end,
-}
-
-local function drawButtons()
-    -- drawText('Select button', 10, 10, 100, 'center')
-    -- love.graphics.setColor(1,1,1)
-    -- love.graphics.setLineWidth(3)
-    -- love.graphics.rectangle('line',0,0,120,40)
-    test_button:draw()
-end
-
 function TouchConfigScene:render()
     MainBackground()
-    drawButtons()
+    widgetList_draw()
 end
 
+---@param e SCENE_onInput
 function TouchConfigScene:onInputMove(e)
     if e.type == "mouse" then
-        test_button:isHovering(e.x, e.y)
+        widgetList_isHovering(e.x, e.y)
     end
 end
+---@param e SCENE_onInput
 function TouchConfigScene:onInputPress(e)
     if e.input == 'menu_back' then SCENE = InputConfigScene() end
-    if e.type == 'mouse' then test_button:press() end
-    if e.type == 'touch' then test_button:press(true) end
+    if e.type =="mouse" then widgetList_press() end
 end
 function TouchConfigScene:onInputRelease(e)
-    if e.type == 'mouse' then test_button:press() end
+    if e.type =="mouse" then widgetList_release() end
 end
 
 return TouchConfigScene
\ No newline at end of file