It is super impressive you have done all this art by yourself - the game looks amazing!
It was fun planning my path through the rooms, and leaping over great distances (the perks of being a cat).
Unfortunately, my mouse (no pun intended) doesn't feel smooth when looking up. Looking left/right/down works fine, but when moving the mouse upwards it is very choppy - especially when moving the mouse slowly. I wonder what the problem could be.
But nonetheless, I had a great time playing your game. :3