I had fun with the game, but have a few suggestions and criticisms. I feel that the full game will need more depth, such as more interact points. There also could have been some more "spookiness" in the leadup to the ending. This sentiment becomes more important when you realize that you never actually encounter any horror in one of the two endings. The "look behind you" was quite cool, however, in the other ending.
The artstyle is fun, but the wall text was somewhat difficult to read. Perhaps it could be larger.
I do hope the full game has some more content, but as a demo this shows some promise. I'm not quite sure what your plans are for the full game, but I wish success upon you. Nice work!