oh this is clever! I was stumped by the spikes at first, it didn't click that i needed to disable them in the ghost form. I think with a level or two of tutorial or instruction this could round out quickly !
It's very delightful, the art is cute, the puzzles are fun to work through, and i like the use of the ghost as a mechanic, its a bit different from some of the others like this I've played.
GG!