diff --git a/call&sys.lua b/call&sys.lua
index f117fbb3..3b128052 100644
--- a/call&sys.lua
+++ b/call&sys.lua
@@ -38,8 +38,8 @@ local sceneInit={
 	end,
 	custom=function()
 		optSel=optSel or 1
-		curBG="matrix"
-		BGM("blank")
+		curBG=customRange.bg[customSel[12]]
+		BGM(customRange.bgm[customSel[13]])
 	end,
 	draw=function()
 		curBG="none"
@@ -142,10 +142,10 @@ function buttonControl_gamepad(i)
 	end
 end
 
-mouseDown,mouseMove,mouseUp,wheelmoved={},{},{},{}
-touchDown,touchUp,touchMove={},{},{}
-keyDown,keyUp={},{}
-gamepadDown,gamepadUp={},{}
+local mouseDown,mouseMove,mouseUp,wheelmoved={},{},{},{}
+local touchDown,touchUp,touchMove={},{},{}
+local keyDown,keyUp={},{}
+local gamepadDown,gamepadUp={},{}
 function mouseDown.intro(x,y,k)
 	if k==2 then
 		back()
@@ -229,8 +229,18 @@ end
 function keyDown.custom(key)
 	if key=="left"then
 		customSel[optSel]=(customSel[optSel]-2)%#customRange[customID[optSel]]+1
+		if optSel==12 then
+			curBG=customRange.bg[customSel[12]]
+		elseif optSel==13 then
+			BGM(customRange.bgm[customSel[13]])
+		end
 	elseif key=="right"then
 		customSel[optSel]=customSel[optSel]%#customRange[customID[optSel]]+1
+		if optSel==12 then
+			curBG=customRange.bg[customSel[optSel]]
+		elseif optSel==13 then
+			BGM(customRange.bgm[customSel[optSel]])
+		end
 	elseif key=="down"then
 		optSel=optSel%#customID+1
 	elseif key=="up"then
diff --git a/conf.lua b/conf.lua
index 80fa7445..555fa824 100644
--- a/conf.lua
+++ b/conf.lua
@@ -9,7 +9,7 @@ function love.conf(t)
 	t.audio.mixwithsystem=true--Switch on to keep sysBGM
 
 	local W=t.window
-	W.title="Techmino V0.7.20"
+	W.title="Techmino V0.7.21"
 	W.icon="/image/icon.png"
 	W.width,W.height=1280,720
 	W.minwidth,W.minheight=640,360
diff --git a/dataList.lua b/dataList.lua
index f3e4de9f..35e1e724 100644
--- a/dataList.lua
+++ b/dataList.lua
@@ -83,7 +83,7 @@ loadmode={
 	c4wtrain=function()
 		createPlayer(1,340,15)
 		local F=P.field
-		for i=1,22 do
+		for i=1,24 do
 			F[i]=getNewRow(10)
 			P.visTime[i]=getNewRow(20)
 			for x=4,7 do F[i][x]=0 end
@@ -368,7 +368,6 @@ Event={
 			P.rank=1
 			P.result="WIN"
 			changeAtk(P)
-			BGM("8-bit happiness")
 		end
 		for i=1,#P.atkBuffer do
 			P.atkBuffer[i].sent=true
@@ -379,11 +378,14 @@ Event={
 				P.visTime[i][j]=min(P.visTime[i][j],20)
 			end
 		end
-		if P.id==1 then
+		if P.human then
 			gamefinished=true
 			newTask(Event_task.finish,P)
 			SFX("win")
 			VOICE("win")
+			if modeEnv.royaleMode then
+				BGM("8-bit happiness")
+			end
 		end
 		showText(P,text.win,"beat",90,nil,.4,curMode.id~="custom")
 	end,
@@ -451,11 +453,11 @@ Event={
 		end
 		P.gameEnv.keepVisible=P.gameEnv.visible~="show"
 		showText(P,text.lose,"appear",90,nil,nil,true)
-		if P.id==1 then
+		if P.human then
 			gamefinished=true
-			if modeEnv.royaleMode then BGM("end")end
 			SFX("fail")
 			VOICE("lose")
+			if modeEnv.royaleMode then BGM("end")end
 		end
 		if #players.alive==1 then
 			local t=P
@@ -530,10 +532,7 @@ Event={
 				P.gameEnv.wait=death_wait[s]
 				P.gameEnv.fall=death_fall[s]
 				P.gameEnv.das=int(7.3-s*.4)
-				if s==4 then
-					P.gameEnv.bone=true
-					newTask(Event_task.bgmWarp,P,120)
-				end
+				if s==4 then P.gameEnv.bone=true end
 				showText(P,text.stage[s],"fly",80,-120)
 				SFX("reach")
 			end
@@ -640,7 +639,7 @@ Event_task={
 					removeRow(P.field)
 					removeRow(P.visTime)
 				end
-				if P.id==1 then
+				if #players==1 then
 					pauseGame()
 				end
 				return true
@@ -678,17 +677,19 @@ Event_task={
 	survivor_easy=function(self,P)
 		if not P.control then return end
 		P.counter=P.counter+1
-		if P.counter>=max(60,150-2*P.modeData.event)then
+		if P.counter>=max(60,150-2*P.modeData.event)and P.atkBuffer.sum<4 then
 			ins(P.atkBuffer,{pos=rnd(10),amount=1,countdown=30,cd0=30,time=0,sent=false,lv=1})
-			P.counter=0
+			P.atkBuffer.sum=P.atkBuffer.sum+1
+			P.stat.recv=P.stat.recv+1
 			if P.modeData.event==45 then showText(P,text.maxspeed,"appear",80,-140)end
+			P.counter=0
 			P.modeData.event=P.modeData.event+1
 		end
 	end,
 	survivor_normal=function(self,P)
 		if not P.control then return end
 		P.counter=P.counter+1
-		if P.counter>=max(90,180-2*P.modeData.event)then
+		if P.counter>=max(90,180-2*P.modeData.event)and P.atkBuffer.sum<8 then
 			local d=P.modeData.event+1
 			if d%4==0 then		ins(P.atkBuffer,{pos=rnd(10),amount=1,countdown=60,cd0=60,time=0,sent=false,lv=1})
 			elseif d%4==1 then	ins(P.atkBuffer,{pos=rnd(10),amount=2,countdown=70,cd0=70,time=0,sent=false,lv=1})
@@ -697,52 +698,52 @@ Event_task={
 			end
 			P.atkBuffer.sum=P.atkBuffer.sum+d%4+1
 			P.stat.recv=P.stat.recv+d%4+1
-			if P.atkBuffer.sum>20 then garbageRelease()end
-			P.counter=0
 			if P.modeData.event==45 then showText(P,text.maxspeed,"appear",80,-140)end
-			P.modeData.event=P.modeData.event+1
+			P.counter=0
+			P.modeData.event=d
 		end
 	end,
 	survivor_hard=function(self,P)
 		if not P.control then return end
 		P.counter=P.counter+1
-		if P.counter>=max(60,180-2*P.modeData.event)then
+		if P.counter>=max(60,180-2*P.modeData.event)and P.atkBuffer.sum<15 then
 			if P.modeData.event%3<2 then
 				ins(P.atkBuffer,{pos=rnd(10),amount=1,countdown=0,cd0=0,time=0,sent=false,lv=1})
 			else
 				ins(P.atkBuffer,{pos=rnd(10),amount=3,countdown=60,cd0=60,time=0,sent=false,lv=2})
 			end
-			P.atkBuffer.sum=P.atkBuffer.sum+(P.modeData.event%3<2 and 1 or 3)
-			if P.atkBuffer.sum>20 then garbageRelease()end
-			P.counter=0
+			local R=(P.modeData.event%3<2 and 1 or 3)
+			P.atkBuffer.sum=P.atkBuffer.sum+R
+			P.stat.recv=P.stat.recv+R
 			if P.modeData.event==45 then showText(P,text.maxspeed,"appear",80,-140)end
+			P.counter=0
 			P.modeData.event=P.modeData.event+1
 		end
 	end,
 	survivor_lunatic=function(self,P)
 		if not P.control then return end
 		P.counter=P.counter+1
-		if P.counter>=max(60,150-P.modeData.event)then
+		if P.counter>=max(60,150-P.modeData.event)and P.atkBuffer.sum<20 then
 			local t=max(60,90-P.modeData.event)
 			ins(P.atkBuffer,{pos=rnd(10),amount=4,countdown=t,cd0=t,time=0,sent=false,lv=3})
 			P.atkBuffer.sum=P.atkBuffer.sum+4
-			if P.atkBuffer.sum>15 then garbageRelease()end
-			P.counter=0
+			P.stat.recv=P.stat.recv+4
 			if P.modeData.event==60 then showText(P,text.maxspeed,"appear",80,-140)end
+			P.counter=0
 			P.modeData.event=P.modeData.event+1
 		end
 	end,
 	survivor_ultimate=function(self,P)
 		if not P.control then return end
 		P.counter=P.counter+1
-		if P.counter>=max(300,600-10*P.modeData.event)then
+		if P.counter>=max(300,600-10*P.modeData.event)and P.atkBuffer.sum<20 then
 			local t=max(300,480-12*P.modeData.event)
 			ins(P.atkBuffer,{pos=rnd(10),amount=4,countdown=t,cd0=t,time=0,sent=false,lv=2})
 			ins(P.atkBuffer,{pos=rnd(10),amount=4,countdown=t,cd0=t,time=0,sent=false,lv=3})
 			ins(P.atkBuffer,{pos=rnd(10),amount=6,countdown=1.2*t,cd0=1.2*t,time=0,sent=false,lv=4})
 			ins(P.atkBuffer,{pos=rnd(10),amount=6,countdown=1.5*t,cd0=1.5*t,time=0,sent=false,lv=5})
 			P.atkBuffer.sum=P.atkBuffer.sum+20
-			if P.atkBuffer.sum>32 then garbageRelease()end
+			P.stat.recv=P.stat.recv+4
 			P.counter=0
 			if P.modeData.event==31 then showText(P,text.maxspeed,"appear",80,-140)end
 			P.modeData.event=P.modeData.event+1
diff --git a/font.ttf b/font.ttf
index e0d542f0..fa8fb009 100644
Binary files a/font.ttf and b/font.ttf differ
diff --git a/gamefunc.lua b/gamefunc.lua
index 8a257628..5a7fdb8b 100644
--- a/gamefunc.lua
+++ b/gamefunc.lua
@@ -1015,7 +1015,7 @@ end
 function pressKey(i,p)
 	P=p
 	P.keyPressing[i]=true
-	if P.id==1 then
+	if P.human then
 		virtualkeyDown[i]=true
 		virtualkeyPressTime[i]=10
 	end
diff --git a/image/mess/title.png b/image/mess/title.png
index 12041aa5..a5a5aba1 100644
Binary files a/image/mess/title.png and b/image/mess/title.png differ
diff --git a/image/mess/title_old.png b/image/mess/title_old.png
new file mode 100644
index 00000000..12041aa5
Binary files /dev/null and b/image/mess/title_old.png differ
diff --git a/language/chi.lua b/language/chi.lua
index 44374368..65c3dafa 100644
--- a/language/chi.lua
+++ b/language/chi.lua
@@ -91,7 +91,7 @@ return{
 
 	load={"加载语音ing","加载音乐ing","加载音效ing","加载完成",},
 	tips={
-		"不是动画，真的在加载!",
+		"不是动画,真的在加载!",
 		"整个游戏都是MrZ完成的!",
 		"大满贯10连击消四全清!",
 		"<方块研究所>有一个Nspire-CX版本!",
@@ -103,7 +103,7 @@ return{
 		"Miya:喵!",
 		"225238922,哔哩哔哩 干杯~",
 		"适度游戏益脑,沉迷游戏伤身,合理安排时间,享受健康生活",
-		"合群了就会消失，但是消失不代表没有意义",
+		"合群了就会消失,但是消失不代表没有意义",
 		"学会使用两个旋转键,三个更好",
 		"更小的DAS和ARR拥有更高的操作上限",
 		"注意到\"旋转\"到底对方块做了些什么吗?",
@@ -158,10 +158,10 @@ return{
 			quit="退出",
 		},
 		mode={
-			up="Λ",
-			down="v",
-			left="<",
-			right=">",
+			up="↑",
+			down="↓",
+			left="←",
+			right="→",
 			start="开始",
 			custom="自定义(C)",
 			back="返回",
@@ -175,8 +175,8 @@ return{
 		custom={
 			up="↑",
 			down="↓",
-			left="<",
-			right=">",
+			left="←",
+			right="→",
 			start1="消除开始",
 			start2="拼图开始",
 			draw="画图(D)",
diff --git a/language/chi_full.lua b/language/chi_full.lua
index 690f2ee9..08fdc8db 100644
--- a/language/chi_full.lua
+++ b/language/chi_full.lua
@@ -158,10 +158,10 @@ return{
 			quit="退出",
 		},
 		mode={
-			up="Λ",
-			down="v",
-			left="<",
-			right=">",
+			up="↑",
+			down="↓",
+			left="←",
+			right="→",
 			start="开始",
 			custom="自定义(C)",
 			back="返回",
@@ -175,8 +175,8 @@ return{
 		custom={
 			up="↑",
 			down="↓",
-			left="<",
-			right=">",
+			left="←",
+			right="→",
 			start1="消除开始",
 			start2="拼图开始",
 			draw="画图(D)",
diff --git a/language/eng.lua b/language/eng.lua
index 86cec50a..f059d195 100644
--- a/language/eng.lua
+++ b/language/eng.lua
@@ -158,10 +158,10 @@ return{
 			quit="Quit",
 		},
 		mode={
-			up="Λ",
-			down="v",
-			left="<",
-			right=">",
+			up="↑",
+			down="↓",
+			left="←",
+			right="→",
 			start="Start",
 			custom="Custom(C)",
 			back="Back",
@@ -175,8 +175,8 @@ return{
 		custom={
 			up="↑",
 			down="↓",
-			left="<",
-			right=">",
+			left="←",
+			right="→",
 			start1="Clear Start",
 			start2="Puzzle Start",
 			draw="Draw(D)",
diff --git a/list.lua b/list.lua
index 70864c45..8d2d96ba 100644
--- a/list.lua
+++ b/list.lua
@@ -148,7 +148,7 @@ customRange={
 	target={10,20,40,100,200,500,1000,1e99},
 	freshLimit={0,8,15,1e99},
 	opponent={0,60,30,20,15,10,7,5,4,3,2,1},
-	bg={"none","game1","game2","game3","strap","rgb","grid","glow","matrix"},
+	bg={"none","game1","game2","game3","strap","rgb","glow","matrix"},
 	bgm={"blank","way","race","newera","push","reason","infinite","secret7th","secret8th","rockblock"},
 }
 
@@ -260,16 +260,18 @@ local virtualkeySet={
 	},--PC key feedback
 }
 local customSet={
-	{20,20,1,1,7,1,1,1,3,4,1,1,1},
-	{18,20,1,1,7,1,1,1,8,3,8,1,1},
-	{22,22,1,1,7,3,1,3,8,4,1,1,1},
-	{20,20,1,1,7,1,1,3,8,3,1,1,1},
-	{23,11,8,11,4,1,2,1,8,3,1,1,1},
+	{20,20,1,1,7,1,1,1,3,4,1,3,3},
+	{18,20,1,1,7,1,1,1,8,3,8,3,3},
+	{22,22,1,1,7,3,1,3,8,4,1,8,7},
+	{20,20,1,1,7,1,1,3,8,3,1,7,8},
+	{23,11,8,11,4,1,2,1,8,3,1,4,9},
 }
 local function useDefaultSet(n)
 	for i=1,#customSet[n]do
 		customSel[i]=customSet[n][i]
 	end
+	curBG=customRange.bg[customSel[12]]
+	BGM(customRange.bgm[customSel[13]])
 end
 Buttons={
 	load={},
@@ -283,23 +285,23 @@ Buttons={
 		quit=	{x=1180,y=620,w=120,h=120,rgb=color.lightGrey,	f=50,code=function()gotoScene("quit")end,up="setting",left="help"},
 	},
 	mode={
-		up=		{x=1000,y=210,w=200,h=140,	rgb=color.white,	f=64,	code=function()keyDown.mode("up")end,	hide=function()return modeSel==1 end,},
-		down=	{x=1000,y=430,w=200,h=140,	rgb=color.white,	f=80,	code=function()keyDown.mode("down")end,	hide=function()return modeSel==#modeID end,},
-		left=	{x=190,	y=160,w=100,h=80,	rgb=color.white,			code=function()keyDown.mode("left")end,	hide=function()return levelSel==1 end,},
-		right=	{x=350,	y=160,w=100,h=80,	rgb=color.white,			code=function()keyDown.mode("right")end,hide=function()return levelSel==#modeLevel[modeID[modeSel]]end,},
+		up=		{x=1000,y=210,w=200,h=140,	rgb=color.white,	f=80,	code=function()love.keypressed("up")end,	hide=function()return modeSel==1 end,},
+		down=	{x=1000,y=430,w=200,h=140,	rgb=color.white,	f=80,	code=function()love.keypressed("down")end,	hide=function()return modeSel==#modeID end,},
+		left=	{x=190,	y=160,w=100,h=80,	rgb=color.white,			code=function()love.keypressed("left")end,	hide=function()return levelSel==1 end,},
+		right=	{x=350,	y=160,w=100,h=80,	rgb=color.white,			code=function()love.keypressed("right")end,hide=function()return levelSel==#modeLevel[modeID[modeSel]]end,},
 		start=	{x=1000,y=600,w=250,h=100,	rgb=color.green,	f=50,	code=function()
 			loadGame(modeSel,levelSel)end},
 		custom=	{x=275,	y=420,w=200,h=90,	rgb=color.yellow,			code=function()gotoScene("custom")end},
 		back=	{x=640,	y=630,w=230,h=90,	rgb=color.white,	f=45,	code=back},
 	},
 	music={
-		up=		{x=1100,y=200,w=120,h=120,	rgb=color.white,f=50,code=function()sel=(sel-2)%#musicID+1 end},
+		up=		{x=1100,y=200,w=120,h=120,	rgb=color.white,f=40,code=function()sel=(sel-2)%#musicID+1 end},
 		play=	{x=1100,y=340,w=120,h=120,	rgb=color.white,f=40,code=function()BGM(musicID[sel])end},
 		down=	{x=1100,y=480,w=120,h=120,	rgb=color.white,f=50,code=function()sel=sel%#musicID+1 end},
 		back=	{x=640,	y=630,w=230,h=90,	rgb=color.white,f=45,code=back},
 	},
 	custom={
-		up=		{x=1000,y=220,	w=100,h=100,	rgb=color.white,		code=function()optSel=(optSel-2)%#customID+1 end},
+		up=		{x=1000,y=220,	w=100,h=100,	rgb=color.white,f=50,	code=function()optSel=(optSel-2)%#customID+1 end},
 		down=	{x=1000,y=460,	w=100,h=100,	rgb=color.white,f=50,	code=function()optSel=optSel%#customID+1 end},
 		left=	{x=880,	y=340,	w=100,h=100,	rgb=color.white,f=50,	code=function()customSel[optSel]=(customSel[optSel]-2)%#customRange[customID[optSel]]+1 end},
 		right=	{x=1120,y=340,	w=100,h=100,	rgb=color.white,f=50,	code=function()customSel[optSel]=customSel[optSel]%#customRange[customID[optSel]]+1 end},
@@ -379,9 +381,7 @@ Buttons={
 			VIB(1)
 			end,up="sfx",down="fullscreen",left="swap",right="voc"},
 		voc=	{x=940,y=160,	w=160,	h=60,rgb=color.white,
-			hide=function()
-				return not(kb.isDown("m")or false)
-			end,
+			hide=function()return true end,
 			code=function()
 				setting.voc=not setting.voc
 			end,up="sfx",down="fullscreen",left="vib"},
diff --git a/paint.lua b/paint.lua
index 63bedbf4..2e793c07 100644
--- a/paint.lua
+++ b/paint.lua
@@ -320,12 +320,14 @@ function Pnt.intro()
 end
 function Pnt.main()
 	gc.setColor(1,1,1)
-	gc.draw(titleImage,300,30)
+	gc.draw(titleImage,280,30,nil,1.3)
 	setFont(30)
-	gc.print("Alpha V0.7.20",290,140)
-	gc.print(system,800,110)
+	gc.print("Alpha V0.7.21",290,125)
+	gc.print(system,845,95)
 end
 function Pnt.mode()
+	gc.setColor(1,1,1)
+	gc.draw(titleImage,830,30)
 	setFont(40)
 	gc.setColor(modeLevelColor[modeLevel[modeID[modeSel]][levelSel]]or color.white)
 	mStr(modeLevel[modeID[modeSel]][levelSel],270,215)
@@ -477,7 +479,13 @@ function Pnt.play()
 				gc.setLineWidth(1)
 				gc.setColor(1,1,1,.2)
 				for x=1,9 do gc.line(30*x,-10,30*x,600)end
-				for y=0,19 do gc.line(0,30*y,300,30*y)end
+				for y=0,19 do
+					y=30*y+P.fieldBeneath
+					gc.line(0,y,300,y)
+				end
+				if P.fieldBeneath>20 then
+					gc.line(0,P.fieldBeneath-30,300,P.fieldBeneath-30)
+				end
 			end--Grid lines
 			gc.translate(0,P.fieldBeneath)
 			gc.setScissor(scr.x+P.absFieldX*scr.k,scr.y+P.absFieldY*scr.k,300*P.size*scr.k,610*P.size*scr.k)
@@ -538,9 +546,9 @@ function Pnt.play()
 				end
 				--Draw game field
 			gc.setScissor()--In-playField mask
-			gc.translate(0,-P.fieldBeneath)
 			gc.setColor(1,1,1)
 			gc.draw(PTC.dust[p])
+			gc.translate(0,-P.fieldBeneath)
 			gc.setLineWidth(3)
 			gc.rectangle("line",-1,-11,302,612)--Draw boarder
 
@@ -775,7 +783,7 @@ function Pnt.help()
 	for i=1,11 do
 		gc.printf(text.help[i],140,15+43*i,1000,"center")
 	end
-	gc.draw(titleImage,180,600,.2,.7+.05*sin(Timer()*2),nil,140,100)
+	gc.draw(titleImage,250,600,.2,1+.05*sin(Timer()*2),nil,212,35)
 	gc.setLineWidth(5)
 	gc.rectangle("line",17,17,260,260)
 	gc.rectangle("line",1077,17,186,186)
@@ -794,5 +802,5 @@ function Pnt.stat()
 		gc.print(text.stat[i],400,30*i-5)
 		gc.print(statOpt(i),720,30*i-5)
 	end
-	gc.draw(titleImage,260,570,.2+.07*sin(Timer()*3),.8,nil,250,60)
+	gc.draw(titleImage,260,600,.2+.07*sin(Timer()*3),nil,nil,212,35)
 end
\ No newline at end of file
diff --git a/toolfunc.lua b/toolfunc.lua
index 8c6bcf0f..d51230ef 100644
--- a/toolfunc.lua
+++ b/toolfunc.lua
@@ -127,9 +127,12 @@ end
 function BGM(s)
 	if setting.bgm and bgmPlaying~=s then
 		if bgmPlaying then newTask(Event_task.bgmFadeOut,nil,bgmPlaying)end
-		for i=1,#Task do
-			if Task[i].code==Event_task.bgmFadeIn then
-				Task[i].code=Event_task.bgmFadeOut
+		for i=#Task,1,-1 do
+			local T=Task[i]
+			if T.code==Event_task.bgmFadeIn then
+				T.code=Event_task.bgmFadeOut
+			elseif T.code==Event_task.bgmFadeOut and T.data==s then
+				rem(Task,i)
 			end
 		end
 		if s then