Now let's build a game. Biff needs to collect 5 power cells. One complication... the moon base is crawling with dogs! Avoid the dogs while collecting 6 power cells to win the game. But watch out! Touch a dog and you will lose your health. Press space to fire a rocket.
functions, simple messaging, simple events, advanced costume handling, simple sound playing, simple loops, basic math, visibility, graphic effects, delays,