To move cat, use W,A,S,D. To move Paul, use the arrow keys. To make Paul beatbox, press K. To make Cat mug, press 1. The aim of the game is to unlock the mystery of the cheese puffs(hint; maybe B does something...and while you're at it, what about P...) If everyone is just darn confused/disturbed, press space bar.
I'd just like to take this time to thank myself for being awesome. I would also just like to point out that this fabulous game took me a total of about 2 hours.