The graphics are fantastic in this game, and I appreciate the ability to play with a friend in local coop. I just had a hard time playing since the framerate drops more the longer you survive which I'm not sure how it could be optimized exactly. It's definitely caused by the number of enemies so maybe if enemies could only spawn near the player instead of offscreen, it would help with the performance. Or maybe making the enemies less numerous but stronger individually.
I did download the game and played it through the exe on windows.