Interesting horror game, I like the spirit helper concept and the puzzle element! The premise and story is also interesting and has potential for expansion.
I think there should be some indication/tutorial that your spirit friends are helping you flip switches, as I initially thought they didn't do anything, and I was confused (at first).
Also, you should try putting in some form of music/sounds, a soundless game is very jarring and would affect your score in the Audio department. You don't have to make it yourself, just grab some free music online or use a software like sfxr to generate sounds. If you know what you are doing, it is possible to do it in like 15 mins, lol.
Other than that, good job on the game!