You move with the arrow keys and shoot fireballs with space. You can also move down for a little bit with the down arrow to dodge the waterballs.
Original by Linkyda3rd ^, I just made it a bit smoother and added a small damage animation. Update: Made it so when you crouch you don't get hit by fireballs. I also made it so you go slower while crouching. fixed a bug or two. I may change the walking animation, I'm just too lazy to do it right now.