Use the arrow keys to move the spaceship. The left arrow key makes it go left, & the right makes it go right. The spacebar sends a laser that destroys asteroids. Activate a shield with the down arrow. If an asteroid hits your ship, you lose. When you lose, hit the green flag to start over. Don't worry, your high score won't be reset.
@SapphirePX gave me the idea to send the spaceship back a bit when it touches the edge.
