In Fullscreen and in Chrome it worked for me! I was able to play the first lvs a couple of time. Maybe try changing browser or Fullscreen first. If you type a letter and the Game is not the "selected part" of the screen i got the error aswell. But in fullscreen it was fine.
I have to say: HOW HARD is that game? xD I was so overtired by the jam and when i was trying the 3. lv my brain collapsed. BUT i played many attempts and it was worth it. Intelligent, New, Demanding (!) I like :D