Hi, I just gave it a quick spin just to see how it runs and it runs super smooth! Bonus points for native integer scaling for that pixel perfect aspect ratio. The game had zero problems detecting my dualshock 4 controller. I don't mind the keyboard + gamepad setup for co-op but if it's not too much trouble maybe you could allow 2 gamepads?
I'll give you more feedback when I finish it with my brother in a week or so when we'll be able to play it together. Thanks for making it!