Now let's build a game. Biff needs to collect 10 crystals. One complication... the park is crawling with zombies! Avoid the zombies while collecting 10 crystals to win the game. But watch out! Touch a zombie and you will lose your health. Press 'A' to fire a rocket. Press 'S' to fire a laser. Press 'D' to plant a bomb. When the zombies see you they will follow you so draw them to a bomb but you still have to collect 10 crystals.
functions, simple messaging, simple events, advanced costume handling, simple sound playing, simple loops, basic math, visibility, graphic effects, delays,