This is one of the best entries that I have played thus far. I really liked the idea, and I'm impressed by how much content you were able to put in this game! 28 levels with 6 different forms to possess, 3 different types of traps, contraptions, and all of that with their sprites and animations, sound effects, background music, and a good tutorial - great job!
The aesthetics were great, especially for this kind of game as every element is clearly distinguishable from the other. I had no issues with the controls nor the instructions, and it was a good brain teaser.
The only feedback I would give is that I think the wizard may be redundant. His power is to create a platform to jump on, however you have a body that is literally a walking platform, so the wizard does not stand out as much. One idea for his power is that maybe he can change the location of one of the doorways?
Regardless, I thoroughly enjoyed this game. If you plan to expand upon this, I look forward to seeing your progress. Great stuff!