bug of pong

[imbbctoo]

i find pong cannot work today.
after resreaching i think there is a sth wrong with listenOnce. you know in the code of pong, a listenonce was added on this.world. i didn't do anything with the code but when it shows click to begin, i click it but nothing happend, the game cannot begin. but if i add goog.events.listen(this.world, ['touchstart', 'mousedown'], this.start, false, this) before listenonce, it works. can you tell me whether there is sth wrong with closure or sth wrong with limejs?

[sagestudios]

Hope this will help: #159