diff --git a/assets/scene/app_pong.lua b/assets/scene/app_pong.lua
deleted file mode 100644
index 86ee4179..00000000
--- a/assets/scene/app_pong.lua
+++ /dev/null
@@ -1,187 +0,0 @@
-local gc=love.graphics
-
-local abs=math.abs
-local max,min=math.max,math.min
-local rnd=math.random
-
----@type Zenitha.Scene
-local scene={}
-
-local state
-
-local player={} -- Player data
-local ball={ -- Rotation Y
-    x=640,y=360,
-    vx=0,vy=0,
-    ry=0,
-}
-
-local W,H=1400,900
-local autoMoveFactor=26
-local moveAcc,maxMoveSpeed=2600,2600
-local rollRate,ryTransSpeed=0.62,620
-
-function scene.enter()
-    BG.set('none')
-    state=0
-
-    ball.x,ball.y=640,360
-    ball.vx,ball.vy=0,0
-    ball.ry=0
-
-    player[1]={
-        score=0,
-        y=360,
-        vy=0,
-        targetY=false,
-    }
-    player[2]={
-        score=0,
-        y=360,
-        vy=0,
-        targetY=false,
-    }
-end
-
-local function start()
-    state=1
-    ball.vx=MATH.coin(360,-360)
-    ball.vy=rnd()*6-3
-end
-function scene.keyDown(key,isRep)
-    if isRep then return true end
-    if key=='space' then
-        if state==0 then
-            start()
-        end
-    elseif key=='r' then
-        state=0
-        ball.x,ball.y=640,360
-        ball.vx,ball.vy=0,0
-        ball.ry=0
-        player[1].score,player[2].score=0,0
-        FMOD.effect('rotate')
-    elseif key=='w' or key=='s' then
-        player[1].targetY=false
-    elseif key=='up' or key=='down' then
-        player[2].targetY=false
-    elseif key=='escape' then
-        if sureCheck('back') then SCN.back() end
-    end
-    return true
-end
-function scene.touchDown(x,y)
-    scene.touchMove(x,y)
-    if state==0 then start() end
-end
-function scene.mouseDown(_,_,k) if state==0 and k==1 then start() end end
-function scene.touchMove(x,y)(x<640 and player[1] or player[2]).targetY=y end
-function scene.mouseMove(x,y)(x<640 and player[1] or player[2]).targetY=y end
-
--- Rect Area X:150~1130 Y:20~700
-function scene.update(dt)
-    -- Update pads
-    for i=1,2 do
-        local P=player[i]
-        if P.targetY then
-            P.vy=P.vy+(P.targetY-P.y)*dt*autoMoveFactor
-        else
-            if isKeyDown(P==player[1] and 'w' or 'up') then
-                P.vy=max(P.vy-moveAcc*dt,-maxMoveSpeed)
-            end
-            if isKeyDown(P==player[1] and 's' or 'down') then
-                P.vy=min(P.vy+moveAcc*dt,maxMoveSpeed)
-            end
-        end
-        P.vy=MATH.expApproach(P.vy,0,dt*6.26)
-        P.y=P.y+P.vy*dt
-        if P.y~=MATH.clamp(P.y,70,650) then
-            P.y=MATH.clamp(P.y,70,650)
-            P.vy=-P.vy*0.626
-        end
-    end
-
-    -- Update ball
-    ball.x,ball.y=ball.x+ball.vx*dt,ball.y+ball.vy*dt
-    if ball.ry~=0 then
-        local dry=ball.ry-MATH.linearApproach(ball.ry,0,ryTransSpeed*dt)
-        ball.vy=ball.vy+dry
-        ball.ry=ball.ry-dry
-        -- if ball.ry>0 then
-        --     ball.ry=max(ball.ry-ryTransSpeed,0)
-        --     ball.vy=ball.vy-ryTransSpeed*dt
-        -- else
-        --     ball.ry=min(ball.ry+ryTransSpeed,0)
-        --     ball.vy=ball.vy+ryTransSpeed*dt
-        -- end
-    end
-    if state==1 then -- Playing
-        -- Player Hit
-        if ball.x<160 or ball.x>1120 then
-            local P=ball.x<160 and player[1] or player[2]
-            local d=ball.y-P.y
-            if abs(d)<60 then
-                ball.vx=-(ball.vx+MATH.sign(ball.vx)*6)
-                ball.vy=ball.vy+d*.08+P.vy*.5
-                ball.ry=P.vy*rollRate
-                FMOD.effect('touch')
-            else
-                state=2
-            end
-        end
-        -- Wall Hit
-        if ball.y<30 or ball.y>690 then
-            ball.y=ball.y<30 and 30 or 690
-            ball.vy,ball.ry=-ball.vy,-ball.ry
-            FMOD.effect('move')
-        end
-    elseif state==2 then -- Game over
-        if ball.x<-120 or ball.x>1400 or ball.y<-40 or ball.y>760 then
-            state=0
-            ball.x,ball.y=640,360
-            ball.vx,ball.vy=0,0
-
-            local winner=ball.x>640 and 1 or 2
-            player[winner].score=player[winner].score+1
-            TEXT:add({text="+1",x=winner==1 and 470 or 810,y=226,fontSize=50,style='score'})
-            FMOD.effect('beep_rise')
-        end
-    end
-end
-
-function scene.draw()
-    -- Draw score
-    gc.setColor(.4,.4,.4)
-    FONT.set(100)
-    GC.mStr(player[1].score,470,20)
-    GC.mStr(player[2].score,810,20)
-
-    -- Draw boundary
-    gc.setColor(COLOR.L)
-    gc.setLineWidth(4)
-    gc.line(134,20,1146,20)
-    gc.line(134,700,1146,700)
-
-    -- Draw ball & speed line
-    gc.setColor(1,1,1-abs(ball.ry)*.16)
-    gc.circle('fill',ball.x,ball.y,10)
-    gc.setColor(1,1,1,.1)
-    gc.line(ball.x+ball.vx*22,ball.y+ball.vy*22,ball.x+ball.vx*30,ball.y+ball.vy*30)
-
-    -- Draw pads
-    gc.setColor(1,.8,.8)
-    gc.rectangle('fill',134,player[1].y-50,16,100)
-    gc.setColor(.8,.8,1)
-    gc.rectangle('fill',1130,player[2].y-50,16,100)
-
-    FONT.set(30)
-    gc.print(ball.vx,100,100)
-    gc.print(ball.vy,100,120)
-end
-
-scene.widgetList={
-    WIDGET.new{type='button',x=640,y=45,w=150,h=50,fontSize=35,text=CHAR.icon.retry,code=WIDGET.c_pressKey'r'},
-    WIDGET.new{type='button',x=640,y=675,w=150,h=50,fontSize=40,sound_trigger='button_back',text=CHAR.icon.back,code=WIDGET.c_backScn()},
-}
-
-return scene