Hi there. Congratulations on completing the jam! Here are my thoughts on the game:
First of all dying here is waaaay too easy. If we so much as touch a wall, we immediately die. That is how we progress, but it also means the game's pacing is way too stop-and-go-ish. So, I'd suggest toning that down a little bit. Maybe focus on finding interesting ways to kill yourself / areas that let you stay longer as a ghost, etc? The game might become a fun puzzle-platformer!
Cheers!