This fulfills the requirements of the assignment and then some! I'm glad you both stay with the plan of the ghost and the different colliders. This prototype show you can build complex game scenarios with this mechanic alone. I am glad you were able to match mechanics with theme, and that both the artwork and the music follow up as well. Of course, this needs more work to truly fulfill the promises made here, but I really think you have all you need technically and conceptually. Now is a matter of time and diligence. You can do it!