Debug challenge: There are some mistakes in this game: Can you find them? Can you fix them? Can you make the game better: Things to fix: * The spacecraft should turn clockwise when you press the right arrow * When you shoot a planet the score should go up not down Things to extend: * Add a health powerup that appears. When you collect it, your health goes back to 100 * Add a timer that counts up from 0 to see how long you can survive * Add different costumes and make them display randomly
