Just two health for whimp? really? I was able to beat the boss with Chuck, but I had trouble finding a vulnerable state when fighting him just with whimp. Going into this completely blind, I though the strategy was to possess the cloud, so i tried that for waaay longer than I should have. If the idea is that he's powerless as himself, throw in a few enemies before the boss? Or make the Boss encounter involve spawning new enemies? Idk, Kirby's adventure did it. I like the technique of "wall jumping" and the character development of chuck in the beginning. Lots of possibility with the other characters. I ran into a bug when I took damage with one HP left and the healthbar was just violently shaking. There were also a few times where I just died at random it seemed.
Overall is a real great concept. I Like all the art that's in and I enjoyed playing. keep it up.