nice game. not sure if it's a bug or smething but when I played the gamefor the first time I had it's window open and would switch btween it and my firefox browser window quite often via alt+tab and/or by simoply ckicking the firefox window in the background (the game window is small, so it doesnt cover the full screen)
after the third or so refocssing the game window, I couldnt attack anymore. like the game window had focus back I could move and jump around as usual but x jsut didnt do anything anymore. which ruined the run since you have to kill that one knight to continue in that certain corridor :-/
Might be something caused by my notebook, not sure, but I just thought to let you know