Cute game! I love the background art and the meeples in the trees. The different powerups for throwing your head made for some cool level design. I couldn't get past the level after ghost mode was introduced though. I had jump mode on, left my head on the plate to open the purple door, but would get pushed down when I tried to jump to the platform, like the collision box was still there.
You have the foundation of a really cool game though! I'd love to see it expanded after the jam :)