Interesting concept! It needs more tweaks but making the player make multiple decisions at the same time is a good idea I think. The version now we are playing basically force the player keep slashing in the end. Maybe 4 players at the same time were too much. Or maybe it only needs more tweaks. Besides, like the art of it. Nice work!
This is my game, please give it a try if you will: https://itch.io/jam/gmtk-2019/rate/461812