I reached the end of the game and overall enjoyed the experience despite not being your target audience. The horror aspects do nothing for me but the picture puzzles were pleasant.
You might want to consider giving the user a bit more direction on the initial pizza puzzle. I was stumped for a long time because I thought that I had to select each of the 8 slices in order. I thought stepping on the arrow button pointing to slice 1 would select that slice. I wanted to select slice 2 but couldn't understand how to select it since it doesn't have a corresponding arrow. It took me ages to understand that the arrows reordered all the slices in the row. Maybe that kind of confusion is exactly what you want your user to feel, but maybe not.