Drive the rays!
The city is being invaded and the shields are off! Drive the rays to the exit to open doors, reach the control center and flip the general switch to give energy to the shields!

To complete this puzzle map you have to drive a lazer ray to the exit by placing blocks in the right position to change its direction, very simple!

In the map there is also a little of action: invaders won't let you to pass, strike them with the ray to kill them!