The cat is hiding somewhere on the screen. If you look closely you might see it. Click on it to unveil its hiding place and claim your victory! You can draw on the background temporarily to make things more visible. Just click and drag. If you want to make things really interesting, try using the space bar and/or the arrow keys to change up the scenery a bit. ;)
I got bored, so I threw this together. I don't know that it's very challenging, but some of the effects I threw in make it kind of fun to play with. Busted, cat! Music is "Inspired" by Kevin MacLeod.