I think that with some polishing and expansion this concept can really shine! Good job!

I was a little confused when I was the purple ghost. I removed the box, but the message didn't go away and it wouldn't let me return to my human form. I had to re-possess the green ghost and then go back. Also I have no idea what that weird blue diamond outside the walls was.

That said, it's a good base for a puzzle game. And while the assest were pre-existing, I like the general vibe of the game.

Interesting concept! Also reminded me of Luigi's Mansion for some reason. Good job!!

Really nice concept!Could really develop some interesting puzzles if you had more time,  the environment look amazing, even without considering the short time span. Good job!

(Also it would be really appreciated if you could go check out my game!)