Very nice! For some reason, after I died and respawned in the first room, the game didn't respond to any of my key presses and I had to Alt+F4 out of it.
We're sorry you had to experience that bug and jump to a drastic option like Alt+F4. However we really do appreciate you taking the time to let us know. We've patched your issue and just finished uploading a newly patched copy of the game for windows(1_2_4).
