Niice!
I love it.
Um.. heres the code for a level I made, if you can add it somewere into the game.
lvls[0] = {name:"Test", build:[{x:20,y:20,w:30,h:250},{x:50,y:270,w:450,h:-50},{x:5
00,y:220,w:-30,h:-120},{x:470,y:100,w:-170,h:20},{x:300,y:12
0,w:20,h:70},{x:300,y:180,w:-170,h:-40},{x:190,y:170,w:20,h:
40},{x:140,y:140,w:60,h:-90},{x:190,y:60,w:80,h:40},{x:30,y:
10,w:470,h:20},{x:470,y:10,w:20,h:90},{x:357,y:49,w:68,h:24}
,{x:410,y:70,w:-20,h:50},{x:361,y:61,w:-44,h:8},{x:317,y:68,
w:11,h:-26},{x:145,y:69,w:-78,h:4},{x:50,y:97,w:57,h:66},{x:
99,y:151,w:18,h:8},{x:100,y:159,w:8,h:57},{x:104,y:204,w:18,
h:-3},],zones:[{type:"start",x:200,y:100},{type:"end",x:320,
y:120},], pu:{x:undefined,y:undefined}}