If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Frightening moment! Hazardous spheres are seen progressing to destroy the earth. Be the earth saving robot and destroy the spheres by shooting them completely. Select the weapon and destroy the spheres. Once the weapon’s bullets gets empty, choose any of the other weapons to destroy the spheres. Grab the advantageous boosters to get additional powers.
Use right and left arrow keys to move the robot.
Use mouse to shoot the spheres.