diff --git a/Zframework/task.lua b/Zframework/task.lua
index 3fa19084..a7a7c976 100644
--- a/Zframework/task.lua
+++ b/Zframework/task.lua
@@ -1,6 +1,5 @@
 local rem=table.remove
-local assert=assert
-local resume,status=coroutine.resume,coroutine.status
+local assert,resume,status=assert,coroutine.resume,coroutine.status
 local tasks={}
 
 local TASK={}
diff --git a/parts/ai.lua b/parts/ai.lua
index ae6506e0..0d4122df 100644
--- a/parts/ai.lua
+++ b/parts/ai.lua
@@ -1,6 +1,6 @@
 local int,ceil,min,abs,rnd,modf=math.floor,math.ceil,math.min,math.abs,math.random,math.modf
 local ins,rem=table.insert,table.remove
-local resume,yield=coroutine.resume,coroutine.yield
+local yield=coroutine.yield
 -- controlname:
 -- 1~5:mL,mR,rR,rL,rF,
 -- 6~10:hD,sD,H,A,R,
@@ -79,7 +79,7 @@ if type(_CC)=="table"then
 		P.cur=rem(P.nextQueue,1)
 		P.curX,P.curY=blockPos[P.cur.id],int(P.gameEnv.fieldH+1-modf(P.cur.sc[1]))+ceil(P.fieldBeneath/30)
 
-		assert(resume(P.newNext))
+		P.newNext()
 		local id=CCblockID[P.nextQueue[P.AIdata.next].id]
 		if id then
 			CC.addNext(P.AI_bot,id)
diff --git a/parts/player/init.lua b/parts/player/init.lua
index 04fcf48d..ac2f380d 100644
--- a/parts/player/init.lua
+++ b/parts/player/init.lua
@@ -178,7 +178,7 @@ local function newEmptyPlayer(id,mini)
 	P.type="none"
 	P.sound=false
 
-	-- P.newNext=false--Coroutine to get new next, loaded in applyGameEnv()
+	-- P.newNext=false--Warped coroutine to get new next, loaded in applyGameEnv()
 
 	P.keyPressing={}for i=1,12 do P.keyPressing[i]=false end
 	P.movDir,P.moving,P.downing=0,0,0--Last move key,DAS charging,downDAS charging
@@ -312,8 +312,8 @@ local function applyGameEnv(P)--Finish gameEnv processing
 
 	if ENV.nextCount==0 then ENV.nextPos=false end
 
-	P.newNext=coroutine.create(getSeqGen(P))
-	assert(coroutine.resume(P.newNext,P,P.gameEnv.seqData))
+	P.newNext=coroutine.wrap(getSeqGen(P))
+	P.newNext(P,P.gameEnv.seqData)
 
 	if P.mini then
 		ENV.lockFX=false
diff --git a/parts/player/player.lua b/parts/player/player.lua
index 2a294017..d523b5e4 100644
--- a/parts/player/player.lua
+++ b/parts/player/player.lua
@@ -6,7 +6,7 @@ local Player={}--Player class
 local int,ceil,rnd=math.floor,math.ceil,math.random
 local max,min,modf=math.max,math.min,math.modf
 local ins,rem=table.insert,table.remove
-local resume,yield=coroutine.resume,coroutine.yield
+local resume,yield,status=coroutine.resume,coroutine.yield,coroutine.status
 
 local kickList=require"parts.kickList"
 
@@ -121,8 +121,8 @@ function Player:RND(a,b)
 end
 function Player:newTask(code,...)
 	local thread=coroutine.create(code)
-	coroutine.resume(thread,self,...)
-	if coroutine.status(thread)~="dead"then
+	resume(thread,self,...)
+	if status(thread)~="dead"then
 		self.tasks[#self.tasks+1]={
 			thread=thread,
 			code=code,
@@ -763,7 +763,7 @@ function Player:popNext(ifhold)--Pop nextQueue to hand
 	self.ctrlCount=0
 
 	self.cur=rem(self.nextQueue,1)
-	assert(resume(self.newNext))
+	self.newNext()
 	if self.cur then
 		self.pieceCount=self.pieceCount+1
 		if self.AI_mode=="CC"then
@@ -1512,8 +1512,8 @@ function Player:loadAI(data)--Load AI params
 	else
 		self:setRS("TRS")
 	end
-	self.AI_thread=coroutine.create(AIFUNC[data.type])
-	coroutine.resume(self.AI_thread,self,self.AI_keys)
+	self.AI_thread=coroutine.wrap(AIFUNC[data.type])
+	self.AI_thread(self,self.AI_keys)
 end
 --------------------------</Methods>--------------------------
 
diff --git a/parts/player/update.lua b/parts/player/update.lua
index d04ef910..ecb0c39c 100644
--- a/parts/player/update.lua
+++ b/parts/player/update.lua
@@ -1,8 +1,7 @@
 local max,min=math.max,math.min
 local int,abs,rnd=math.floor,math.abs,math.random
 local rem=table.remove
-local resume=coroutine.resume
-local status=coroutine.status
+local assert,resume,status=assert,coroutine.resume,coroutine.status
 
 local function updateLine(P)--Attacks, line pushing, cam moving
 	local bf=P.atkBuffer
@@ -100,16 +99,13 @@ local function updateFXs(P,dt)
 		TEXT.update(P.bonus)
 	end
 end
-local updateTasks do--updateTasks(P)
-	local assert=assert
-	function updateTasks(P)
-		local L=P.tasks
-		for i=#L,1,-1 do
-			local tr=L[i].thread
-			assert(resume(tr))
-			if status(tr)=="dead"then
-				rem(L,i)
-			end
+local function updateTasks(P)
+	local L=P.tasks
+	for i=#L,1,-1 do
+		local tr=L[i].thread
+		assert(resume(tr))
+		if status(tr)=="dead"then
+			rem(L,i)
 		end
 	end
 end
@@ -150,8 +146,8 @@ function update.alive(P,dt)
 		local C=P.AI_keys
 		P.AI_delay=P.AI_delay-1
 		if not C[1]then
-			if status(P.AI_thread)=="suspended"then
-				resume(P.AI_thread)
+			if P.AI_thread and not pcall(P.AI_thread)then
+				P.AI_thread=false
 			end
 		elseif P.AI_delay<=0 then
 			P:pressKey(C[1])P:releaseKey(C[1])
diff --git a/parts/scenes/load.lua b/parts/scenes/load.lua
index 45e9299b..0386a0c8 100644
--- a/parts/scenes/load.lua
+++ b/parts/scenes/load.lua
@@ -36,7 +36,7 @@ local function upFloor()
 		SFX.play("click",.3)
 	end
 end
-local loadingThread=coroutine.create(function()
+local loadingThread=coroutine.wrap(function()
 	for i=1,SFX.getCount()do
 		SFX.loadOne()
 		if i%3==0 then YIELD()end
@@ -175,7 +175,6 @@ local loadingThread=coroutine.create(function()
 		logoColor2={COLOR.rainbow_light(r)}
 	end
 	STAT.run=STAT.run+1
-	LOADED=true
 
 	--Connect to server
 	TASK.new(NET.TICK_WS_app)
@@ -194,10 +193,10 @@ local loadingThread=coroutine.create(function()
 			upFloor()
 		end
 		if progress==25 then
-			loadingThread=false
 			SFX.play("welcome_sfx")
 			VOC.play("welcome_voc")
 			THEME.fresh()
+			LOADED=true
 			return
 		end
 		YIELD()
@@ -256,8 +255,8 @@ function scene.update(dt)
 		if progress<25 then
 			local p=progress
 			repeat
-				assert(coroutine.resume(loadingThread))
-			until not loadingThread or skip<=0 or progress~=p
+				loadingThread()
+			until LOADED or skip<=0 or progress~=p
 			if skip>0 then skip=skip-1 end
 		else
 			openTime=openTime+dt
diff --git a/parts/scenes/main.lua b/parts/scenes/main.lua
index 9dcbdafb..08b66486 100644
--- a/parts/scenes/main.lua
+++ b/parts/scenes/main.lua
@@ -12,15 +12,13 @@ local widgetX0={
 	1290,1290,1290,1290,
 }
 
-local cmdEntryThread=coroutine.create(function()
+local cmdEntryThread=coroutine.wrap(function()
 	while true do
-		while true do
-			if YIELD()~="c"then break end
-			SFX.play("ren_6")
-			if YIELD()~="m"then break end
-			SFX.play("ren_9")
-			if YIELD()~="d"then break end
-			SFX.play("ren_11")
+		if
+			YIELD()=="c"and(SFX.play("ren_6")or 1)and
+			YIELD()=="m"and(SFX.play("ren_9")or 1)and
+			YIELD()=="d"and(SFX.play("ren_11")or 1)
+		then
 			SCN.go("app_cmd")
 		end
 	end
@@ -30,7 +28,7 @@ function scene.sceneInit()
 	scrollX=tipLength
 
 	BG.set()
-	coroutine.resume(cmdEntryThread)
+	cmdEntryThread()
 
 	--Set quick-play-button text
 	scene.widgetList[2].text=text.WidgetText.main.qplay..": "..text.modes[STAT.lastPlay][1]
@@ -47,7 +45,7 @@ end
 
 function scene.mouseDown(x,y)
 	if x>=520 and x<=760 and y>=140 and y<=620 then
-		coroutine.resume(cmdEntryThread,
+		cmdEntryThread(
 			x<520+80 and y>620-80 and"c"or
 			x>760-80 and y>620-80 and"m"or
 			x<520+80 and y<140+80 and"d"
@@ -121,7 +119,7 @@ function scene.keyDown(key)
 			SCN.back()
 		end
 	else
-		coroutine.resume(cmdEntryThread,key)
+		cmdEntryThread(key)
 	end
 end