This is an incredible game and concept! But in my opinion, it lacks a couple of things to be ideal:
1) In fact, I don’t know whether I’m right or wrong, but as for me, CREEPY SOUND DESIGN and CREEPY HIDDEN LORE would look PERFECT here (maybe I just didn’t get to it, if this is true then you’re even cooler)
2) In the game there is no feedback for player actions. If you continue to work on the game in the future please add sounds of clicks, moving balls, winning etc.