Wow this is great! I've never been a fan of sticky wall clings in platformers, but this works with that mechanic pretty well. Everything being one color in the background makes for some striking style, but it took me a while to recognize the spikes as spikes instead of just some background fluff, especially when it's a very small area. Played for quite a while, but gave up after failing that big vertical section on the left side over and over, I'm not great at platformers.
Alternate dialogue when standing on their head is consistently funny.