Good submission - I don't see any obvious bugs from my play-through's. Wasn't able to beat the Boss, but I see that other's have been able too, so that makes for a good mix of difficulty. In a game like this, you don't want a boss that's either too easy or too hard, and I feel like you've done a good job at balancing it. My only complaint is the lack of a way to exit the game gracefully. I had to alt-tab and close the game from the task-bar (on Linux at least).