I like the vibe, the progression system and the billboarding on the NPCs (the fact that they turn to look towards you) I think this gives them a sense of life and presence without having to 3D Model animations, really neat work around. I also like the hand drawn feel they have.
The inventory system is smooth and intuitive, I might have enjoyed trying to place fish to maximize bag space the most haha.
The sfx of jumping into the "water" and respawning is too cool to not mention.
I enjoyed the concept, the style and simplicity of it all. I would've liked to have the option to discard unwanted fish as soon as I caught them, other than that - top job.