As a fan of Ghost Master I am compelled to play any game about haunting and what not. Great visuals and post processing clean up and a fun idea, but... the camera really hinders the gameplay.
A quick solution could be to have the camera above the player, make it top down looking into rooms, and get rid of the floating up and down movement. While it would flatten the game, it would make it easier to interact with objects (I would miss them quite often when trying to glide towards them) and see what's going on with the mortals, without needing to do a bunch of complex camera work.
Still, I am always happy to see more ghost games, and I feel if the camera could be fixed up that would improve it that much more, great work.