From the jam page:
ONE RULE TO BIND THEM ALL: TWO BUTTONS TO PLAY, AS IN "ONLY TWO BUTTONS". It's NOT left, right, up, down "and" two action buttons. It's NOT "mouse move" and its usual two buttons. It's litterally JUST TWO buttons.
So, no mouse movement.
Imagine the DK bongos: https://nintendo.fandom.com/wiki/DK_Bongo it should be playable on that.
Or, like 1 finger death punch does on android. Left and right half of a phone screen being a single button each.