Plays fine on gamepad! Though for some reason face-button-left was jump instead of face-button bottom and worked with my left stick but not dpad.
Its an old game, before unity got gamepads figured out, I think they might have fixed it now, but I dont know, Unity is not good software. But basically you map by button number, and different gamepads have their buttons in different order. More modern software (like godot), let you map to the button location and translates it for whatever gamepad you got.
D-pad though, thats on me, silly Bit.