Most of the keys for the fight simply aren't functioning. In the first part the G and the right arrow wouldn't function at all. I then entered full screen mode and then suddenly the right arrow worked, but nothing else. The second part only the down arrow key works for me in window mode or full screen. Seems, as far as I can tell, only the left key works at all for me after the first part of the fight, but that is always blocked on any option after the first attack. I simply can't progress the fight.