diff --git a/main.lua b/main.lua
index 31e5759..94720ca 100644
--- a/main.lua
+++ b/main.lua
@@ -52,6 +52,9 @@ local colors={
 		g.line(0.3,0.5, 0.7,0.5)
 	end,
 }
+function pairs(t)
+	return next,t,nil
+end
 local gobjs={}
 local cgobjs={}
 local lgobjs={}
@@ -62,12 +65,12 @@ for k,v in ipairs(colors) do
 	lgobjs[k]={c=k,super="lines"}
 	mgobjs[k]={c=k,super="color"}
 end
-local ltest=os.time()
+local ltest=0
 debug.sethook(function()
-	local lt=os.time()
-	if lt-ltest>4 then
+	ltest=ltest+1
+	if ltest>=10000 then
 		print("!! we are in a freezer !!",debug.traceback())
-		ltest=lt
+		ltest=0
 	end
 end,"",1000)
 local cc=3
@@ -694,15 +697,14 @@ function love.mousemoved()
 end
 
 function love.update(dt)
-	ltest=os.time()
+	ltest=0
 	dt=math.min(dt,0.2)*(speeds[slow])
-	accumdt=math.min(1,accumdt+dt)
+	accumdt=math.min(0.6,accumdt+dt)
 	local fcc=0
 	while accumdt>1/tps do
 		fcc=fcc+1
 		local dt=1/tps
 		accumdt=accumdt-dt
-		if fcc>10 then return end
 		if running and playdbg then
 			local gc=0
 			local tc=0
@@ -711,7 +713,7 @@ function love.update(dt)
 				gc=gc+(board[x][y] and 1 or 0)
 				tc=tc+1
 			end end
-			if gc/tc>0.8 then
+			if gc/tc>0.4 then
 				local goods={}
 				for _=1,1000 do
 					local ix,iy=math.random(1,bw),math.random(1,bh)
@@ -856,11 +858,7 @@ function love.update(dt)
 			toplchi=plchint
 		end
 		local oam,obm,rm={},{},{}
-		local tt=os.clock()
-		local itc=0
 		for k,v in pairs(tk) do
-			itc=itc+1
-			if os.clock()-tt>2 then error("too long "..itc.."; #"..#tk) end 
 			local x,y=unpack(v)
 			check(x,y,rm,oam,obm)
 		end
@@ -942,6 +940,8 @@ function love.keypressed(k)
 		bat=bat*2
 	elseif k=="f10" then
 		playdbg=not playdbg
+	elseif k=="f11" then
+		love.window.setFullscreen(not love.window.getFullscreen())
 	end
 end