left, right, is move. down and up is attack. (to start, Click green flag twice.) you CAN use WASD The New Regen System alows healing to the player if it reaches Max capacity, BUT if you are at Max Health when it activates you don't get golden/extra hearts. Space can attack too.
Thanks to UncannyAnimations and -YoungSheldon- for inspiration ( I don't Know how to add links, I'm following them.)