This is a 2 player game. Click the flag, then, when the button appears under the words PLAY GAME NOW, mash the button to start the game. Player 1 is moved left and right using the Z (left) and X (right) keys and fires a laser when the S key is pressed. Player 2 is moved using the left and right arrow keys, and fires its laser when the down arrow is pushed.
Made the game with the guidance of Sim at Rolling Robots, and newRacerAnimator, and without their guidance I would not have been able to solve the puzzling glitches that I managed to program into my original version.