noplay=1

function on.enterKey()
tunnel={}
math.randomseed(timer.getMilliSecCounter()*math.random()*100)
lose=false; width=100; wchange=500; tunpos=100;currpos=platform.window:width()/2;score=0
for x=1,platform.window:height() do
tunnel[x]=tunpos
end
platform.window:invalidate();
end

on.enterKey()

function genvalue()
change=math.random()
if change<0.5 and tunpos>0 then
tunpos=tunpos-1
elseif tunpos<platform.window:height() then
tunpos=tunpos+1
end
end

function play()
genvalue()
table.remove(tunnel,1)
table.insert(tunnel,tunpos)
wchange=wchange-1
if wchange==0 then
width=width-1; wchange=500
end
if currpos<=tunnel[5] or currpos>=tunnel[5]+width then
lose=true
end
score=score+1
platform.window:invalidate()
end

function on.paint(gc)
if noplay==1 then
on.enterKey()
end
noplay=2
if lose then
string1="You Crashed!"
string2="Score: "..tostring(score)
string3="Press ENTER to play again!"
gc:drawString(string1,(platform.window:width()-gc:getStringWidth(string1))/2,platform.window:height()/2,"middle")
gc:drawString(string2,(platform.window:width()-gc:getStringWidth(string2))/2,platform.window:height()-gc:getStringHeight(string2),"bottom")
gc:drawString(string3,(platform.window:width()-gc:getStringWidth(string3))/2,platform.window:height(),"bottom")
else
gc:setColorRGB(255*math.random(),255*math.random(),255*math.random())
for x=platform.window:height(),1,-1 do
gc:drawLine(0,platform.window:height()-x,tunnel[x],platform.window:height()-x)
gc:drawLine(tunnel[x]+width,platform.window:height()-x,platform.window:width(),platform.window:height()-x)
end
gc:fillRect(currpos,platform.window:height()-5,2,2)
timer.start(0.01)
end
end

function on.timer()
	timer.stop()
	for x=1,12 do
	play()
	end
end

function on.arrowKey(key)
if key=="left" and currpos>0 then
currpos=currpos-2
elseif key=="right" and currpos<platform.window:height() then
currpos=currpos+2
end
end