Great so far, but in the dual room with the electric beams, I think I defeated the boss but am stuck there (the door doesn't open and nothing seems to make it open).
Thank you for fixing! Came back and successfully played through completely---interesting rebalancing of the slugs and drones, I think I preferred the stronger slugs and weaker drones but not too much difference (but I did miss the slugfest in the one room that is now gone). Thanks also for arrow control options! I used those this time around.