I think there is a memory leak or something... I have only this tab open and firefox takes up an enormous amount of RAM... at times it uses over 130MB, just with this game open, nothing else.
The game should be "guess what's in zdbz'd's head"... it's like those obscure riddle games, only worse... the problem with such games is that they don't rely on some universally accepted logical connections, but rather you have to know how the maker thinks. For instance, why connect the cat to the mouse and not to the bird? Arbitrary.
It's just another maze game... and it's a pity because the player has to watch the mouse all the time and misses on all the pretty hand-drawn animation.
I think there is a bug, at some point my orange died even though the black thingies didn't touch it... still, a nice solid puzzler. Needed more levels though.
4 stars, needs improvement... I hope you make a sequel where the issues mentioned here will be fixed. Most importantly, you need a better way to view the numbers on large grids.
When you change colors, it should change the color of the whole pencil, not just a small band. Way too discreet, I've made countless mistakes because I didn't notice I had the wrong color...