Wow, this is a good entry! Congratulations. The atmosphere is really nice and the controls are smooth. Love that opening run on the marimba. Here are a few thoughts:
1. I really liked the art but sometimes it wasn't very legible. It wasn't always clear what was passable and what was not. Also, the lights were neat but a little distracting. It would help if it was a little more diffuse. The screen transitions were a little disorienting
2. Some of the platforming sequences were really difficult, which is fine, but they really would've benefitted from closer save points. I almost rage quit because I got tired of backtracking. I'm pretty good with zx+arrows but really bad at wasd platforming.
3. I was generally just really confused. Wasn't sure what my goal was or what stuff was. Is this... a carrot? What do I do with this? Why am I collecting cats??? What do I do with them??? I almost gave up until I looked at the game page and saw there were buttons for projectiles. Some more clarity via in-game instructions would be fantastic.
4. Dropping into the water and immediately landing on a mine thing is annoying.
5. Sound effects will add a lot!
Overall, this is one of the best I've played so far. Great work!
Edit: One more thing I forgot: the game would often crash on me when i died.