At the start, press the up arrow to choose Kirito. As for Asuna, press the spacebar. To hit the boss, if you are Kirito, press the right arrow, if you are Asuna, press the left arrow. If you get hit by the boss until you die, press the green flag to restart. Use the WASD controls to move. If you remix it, be sure to make the characters look better.
My brother suggested this.
