I encountered a few bugs that I also saw mentioned in other comments. Also, the whole screen seemed covered in a noisy texture, which could be a stylistic choice but I would tone it down a bit. (maybe it was stronger on my pc since it's an old ass computer and the graphics card is shit? It could've just been buggy).
On the other hand, I think the character felt good to control, there was lots of juice when shooting the water cannon thingie, and charging a shot with rmb was cool. I also really like the art direction. There's a lot of thought put into the visual style that can be seen in things like the characters, assets, and menu (in-game UI could use some improvements though). The game's very visually cohesive and endearing, it's clearly a labour of love. There's still a lot of work to be done though, and it's not a small project. I'd consider lowering the scope of the game, and working on getting the main gameplay loop done asap. Ganbare!