Biff, lost in Spacetown, needs to get back to Earth. Biff needs to get Power Crystals to power his broken rocket. Biff has 3 lives and needs 5 Power Crystals. But Biff has to watch out for the zombies! Goal: Collect 5 Power Crystals and kill the Zombies. Controls: Mouse (or trackpad) to move and aim. A to fire rockets. S to fire lasers. D to place bombs.
functions, simple messaging, simple events, advanced costume handling, simple sound playing, simple loops, basic math, visibility, graphic effects, delays,