I'm working on a game for my Web Game Development course and I seem to be having a couple hiccups in my coding. My game is a "ball drop" type game. You have to catch all the balls that fall from the top of the screen and avoid the one that deducts points. I've got everything working so far, except my walls seem to "off" a bit. My paddle stops short of the left side of the screen, but partially goes off the right. I don't know if this is because of my coding or the registration point on my paddle. If anyone could help me figure this out, I would be eternally grateful. Also, if anyone figures this out, please, could you tell me what I did wrong so I can learn from my mistake? Thank you in advance.

Link to Balldrop.zip- http://hotfile.com/dl/116727026/4972..._Drop.zip.html