The Alienoids spread over 5 planets various stolen gemstones from planet Earth. These stones are sources of a special type of energy used on many planets, including ours. Your mission: bring back all the precious stones stolen by the Alienoids. Get many stars as you can to buy important items in your adventure. A star appears when you destroy an Alienoid. At the end of each level, you can buy items with the stars collected. 1) Bomb (10 stars) - Lets drop incendiary bombs, destroying everything that touches the flames;2) Turbo (15 stars) - Allows you to move quickly;3) Red Laser (20 stars) - It's slower and has low destructive power;4) Green Laser (30 stars) - It's super fast with high power of destruction;5) Shield (40 stars) - To protect you and destroy enemies who try to touch you;Keep eye on your oxygen level. It reduces every second you stay on the planet. Replace some oxygen picking up the medical kits you find. New life each 5000 points.