The atmosphere in this game is very spooky. I love that you've made a sidescrolling anomaly game; I don't know that I've ever seen one before, but it's a great idea. I think if you keep working on this, you could add more anomalies; I only ever saw the tombstone one. I also think you could add a lot of variety by switching up the designs on the growing tombstone (I only ever saw the one with the cross on it grow, so as soon as I saw it I knew I should turn back). The song was a very nice choice; it had so much tension it made me want to just keep running.
Congratulations on completing the jam!