Absolutely delightful!
Enjoyment: This made me laugh so much. The first time you eat a cat, the Wilhelm scream, the crazy ending with the music and the screenshake. Brilliant.
Concept: It's a really nice idea for a game.
Presentation: The art is lovely, and very well animated. The sound design is also great. I also really liked how everything was black and white except the frog. Very stylish.
Use of the Limitation: I like how the camera zooms out as you get bigger, changing how you perceive it.
My one gripe is that the fullscreen key is very near WASD. Being used to game controls, I was OK, but I got my girlfriend to play, and she kept toggling fullscreen on and off by mistake.