Your mission in this strategy game is to take command of your units and lead them to the battle field trying to defeat the enemy aliens and take down their ship. You have 8 upgradable troops at your disposal. You can use YOUR MOUSE or ARROW KEYS to scroll the screen. LEFT CLICK on troops in inferior menu to send them out and destroy the enemy ship. Press "A" KEY to shoot the cannon. Earning medals will also give you points to spend, so you can use that as a strategy to earn more points faster. Good luck!