Destroy the enemy spacecraft having the same number as that of your spacecraft and earn points.
Drag the robot with the mouse and place it on the button whose number is the same as that of the attacking enemy spacecraft. Click the robot to fire your spacecraft. If the rockets from enemy hit your spaceship the strength gets reduced. If the strength is zero you have to update the strength and play next level. If you destroy 50 enemy spacecraft you win the game. If all the updates are finished and the strength is zero you lose the game.
robot, rockets, spacecraft, spaceship