Great game! Really liked how you have to use your keyboard to respond to the opponent - it made me panic (in the best way) about finding the right key to press on time. I feel as though the theme of role reversal could have been expanded upon, as you're essentially doing the same thing - pressing keys in time to the beat - no matter which role you're playing, but very creative idea!
If this were to be expanded upon, I would appreciate clearer UI - such as the point at which the player has to hit a key - and a bit more narrative context/a tutorial so you're not just thrown into the thick of it. Well done!