Very nice game, well polished, the controls are really nice, the transition to leaving your body is really cool and it's really fun.
I think being in your physical body should have more benefits than just walking to an altar leaving your body then only going back when you kill all enemies.
Being able to heal would be nice, either by pick-ups or maybe going in your physical body, then you have a nice balance of heal but cannot hurt enemies or hurt enemies but cannot heal
But its a very nice game well done!