A simple little demo game to show building up the elements of a game. Chosen a space-theme with moon background and shooting the aliens (starfish - ouch!) as they land. Gun and bullet are very simple shapes painted and with centre of rotation set on gun at lower end. Bullet appears "above" gun to show effect - easy to position behind gun as an extra task. Have used "sun" picture for explosion and starfish for the "alien" - it has a nice clear colour to sense collisions. At least one bug still. Simple enough .... 1. Click green flag to start 2. Use mouse to point "gun" 3. Use [SPACE] to fire 4. Get 5 hits to end