Just really solid all around. The difficulty feels very right for a gameboy game, especially when you have to redo some longer platforming sections. Really appreciate the checkpoints right outside each boss room though.
I did die once on the first boss because I had learned bubbles were safe to stand on, and that was quickly disproved, haha. I can see from your lower comments you originally hadn't planned to use bubbles as a travel thing, so I get that it was more of a jam requirement than a design choice.
It was very satisfying to learn the boss patterns, and beat the game.
Your gameboy vibe was excellent, but you did have a couple things (like the rock smash spell) that really break the resolution requirements. (Don't worry, you're not in trouble.) Hope you're going to participate again next year because you really get that gameboy feeling.