Interesting little platformer! For platformers, I generally prefer to always feel like I'm in complete control, so I was a little leery of, when bonking an enemy on the head, or receiving a bonk to the head, it seemed to slow down and take away control from me. That said, it's got solid mechanics and an interesting idea. The graphics are pretty nice, too. I'll say the background music seemed fairly repetitive. Overall, I'd have liked a little more variation in the BGM, and the gameplay was solid with a hint of there's something really good to be found here, if you decide to keep building it post-jam.