I developed this as an example for incoming 1st year undergrad students of what can be done with Scratch. It took me 3 hours total to complete. It is a version of the popular 1980's Atari Missile Command game, with most of the key features present. You move the crosshair with the mouse and fire a defence missile using the mouse button. You have limited defence missiles in each city, which you must defend, and the number of remaining incoming missiles is displayed. You score more for missiles hit higher in the air. You will gain an extra city for each 10000 points you accumulate. If I get time I may add incoming aircraft and a multihead missile, but the gameplay is fine as it stands ... have fun! PS. Type in CHEAT if you want.