I like the level design, and concept a lot, I think this has a lot of potential!

I love the ghost concept of going through walls. My main issue is that there are a lot of particle effects going on in the background, and because the ghosting particle effects are the same as the background, the ghosting effect gets lost in the background.

I think this could be a fun idea, sort of like a portal idea, being able to move through certain walls to solve puzzles could be a cool mechanic