Really creative use of the modifier! The gameplay was pretty original, it was fun to move the mouse to attack instead of just pressing a button, and the suggestions were a good way to make the gameplay more strategic and varied. And the boss fight was incredibly well-made, with plenty of different attacks and phases. My only complaint is that the gameplay was a bit frustrating at times, although that might just be me sucking at the game lol. Either way, great entry!
PS: out of curiosity, is the Boss based on the Void from r/place?