新背景：blockspace

parts/backgrounds/blockspace.lua

@@ -0,0 +1,56 @@
+--Space but tetrominoes
+local gc=love.graphics
+local sin,cos=math.sin,math.cos
+local rnd=math.random
+local ins,rem=table.insert,table.remove
+local back={}
+
+local t
+local mino
+function back.init()
+	t=0
+	mino={}
+end
+function back.update()
+	t=t+1
+	if t%2==0 then
+		local r=rnd(29)
+		ins(mino,{
+			block=TEXTURE.miniBlock[r],
+			color=minoColor[SETTING.skin[r]],
+			ang=6.2832*rnd(),
+			rotate=6.2832*rnd(),
+			vr=.03-rnd()*.06,
+			d=0,
+			v=1,
+		})
+	end
+	local rad=SCR.rad
+	for i=#mino,1,-1 do
+		local M=mino[i]
+		M.d=M.d+M.v
+		if M.d>rad*1.05 then
+			rem(mino,i)
+		else
+			M.rotate=M.rotate+M.vr
+			M.v=M.v*(1+M.d/SCR.rad*.2)
+		end
+	end
+end
+function back.draw()
+	gc.clear(.15,.15,.15)
+	gc.push("transform")
+	gc.origin()
+	gc.translate(SCR.w/2,SCR.h/2)
+	for i=1,#mino do
+		local M=mino[i]
+		local c=M.color
+		gc.setColor(c[1],c[2],c[3],.4)
+		gc.draw(M.block,M.d*cos(M.ang),M.d*sin(M.ang),M.rotate,(18*M.d/SCR.rad)^1.6,nil,M.block:getWidth()/2,M.block:getHeight()/2)
+	end
+	gc.pop()
+end
+function back.discard()
+	mino=nil
+end
+return back

parts/modes/master_extra.lua

@@ -35,7 +35,7 @@ return{
 				end
 			end
 		end,
-		bg="tunnel",bgm="far",
+		bg="blockspace",bgm="far",
 	},
 	slowMark=true,
 	load=function()