Excellent entry all around. I'm kind of jealous honestly, we hadsimilar ideas but completely different execution.
Love how streamlined you made everything. The game is simple and responsive, nothing is useless, your implementation of the theme is hilarious. I think you have your chance at a confortable top 5.
If I had to complain I'd say that I'd like the player character to move a bit faster, and that you can get stuck by digging a grave right under another one. But that'd be peanut compared to what's there.
Again, great job.