I do really like the art style, it stands out pretty well and was the reason I originally clicked on this game. I ended up playing this for longer than I originally thought I would, the way it controls is surprisingly satisfying for how simple it is.
Adding the small hop was a pretty good idea, otherwise I could see making smaller jumps getting pretty tedious after a while. I do wish that it went slightly higher though so that you could clear the rat projectiles with it, that way it could be a nice reaction tool for when you get caught out a bit
I think adding some kind of indicator as to how big of a jump you've charged would help a lot too. Maybe a "power" bar or something? Just some way to tell roughly how far you're going to go when you release the jump button.
Good job though! One of the better platformers I've seen for this jam imo.