Now let's build a game. Biff needs to collect 15 crystals. One complication... the moon base is crawling with zombies! Avoid the zombies while collecting 15 crystals to win the game. But watch out! Touch a zombie and you will lose your health. If you shoot a zombie it will have a little surprise for you!
functions, simple messaging, simple events, advanced costume handling, simple sound playing, simple loops, basic math, visibility, graphic effects, delays,