Really neat, challenging game! I included it in my compilation video series of all of the GBJam 5 games, if you'd like to take a look :)

Man that level with the moving spikes is tough! You really have to have a good sense of the controls before getting the hang of it. It's a clever idea, having a character you can throw and carry around that doesn't get hurt, and you use that to get around hazards that would otherwise hurt you. The levels themselves are well designed, though I do feel like the difficulty curve went up a bit too fast, particularly with that fast moving spike wall. The graphics are pretty cute, even though they are simple. All it really needs now is some audio. :)