Nice little horror game! You definitely had the spooky atmosphere . I've got to admit, the ending didn't make much sense :) I kept waiting for something more to.. happen.
After reading some reviews, I was able to figure out the pick axe puzzle! Like others have said, it's a good idea to give players an idea of how to solve a puzzle. I don't necessarily want to spoil it for others, but introducing a key mechanic earlier is a good idea.