There's one part in one of the later (last?) levels that I wish was switched to teach the mechanics in a slightly different order. I also wish the hitboxes for bouncing on enemy heads was just ever so _slightly_ more forgiving. Lastly, I wish there were checkpoints in the levels so I didn't have to do all the early stuff every time I died. Either that, or potentially a life system so you can fail maybe once or twice before having to start the level over.
Outside of those small things, this game was great! Art is spectacular -- things like the spinning bananas reads so nicely. Sound effects are spot on. Music is great, though I wish there was a slight bit more variety there for how long the game is (maybe I'm just slow). Solid entry and I had a blast playing it.