Try the WebGL version! WebGL Shredsauce
If you're on a Mac and using a PS3 controller (10.6 and up) just plug it in, press the middle button and you'll be able to play automatically. If you're using a wired Xbox controller you'll need to download the tattebogle driver right HERE.
Note that if you're using an xbox controller you need an actual wired one. The power cord won't work unfortunately.