Colony Defender

Aliens are invading your colony! Your goal is to stop the alien invasion by destroying the alien pods before they land. Fly your ship by pressing the left and right arrow keys to fly in that direction or to change direction. Pressing the up and down arrow keys increases or decreases your altitude. Press the Spacebar to shoot the alien ships. Your success is measured in points. You are awarded 100 points for every pod destroyed and lose 1 point for every laser blast fired. Once 50 pods have landed, all hope is lost and the game ends.