This game is fantastic! I'm looking forward to seeing it grow from strength to strength!
I've encountered two bugs that I would like you to be aware of:
1. Pressing the Windows key while in the game, and returning to the game caused it to crash. I would suggest a shortcut key to switch the game from full screen to windowed and back.
2. I happened to die the moment the stage cleared. The game froze, then loaded the next stage, and then crashed.