Enjoyment: It was quite fun to hop around the tank eating... confetti? Fish food, I guess.
Concept: The control scheme is interesting. I'd have let the player click anywhere, rather than specifically on the frog, but the moveset is cool.
Presentation: The art all comes together to sell the feeling of a fish tank. I also liked the music and the jumping sound. The first few times the net appeared, I thought it was an objective. Is there a way to make it seem more menacing?
Use of the Limitation: Interpreting "level" as "character level" is a really funny idea that hadn't even occurred to me. Nice!