Defend your planet from the invaders. To lock on your misiles you must complete each alien's symmetry.

invaderTap the invader to target it.
gridTouch the grid to colour in the squares. If you hit a wrong square you will lose the lock and have to try again.
cityEach level you need to protect three cities. If you lose a lock on an invader they will fire back at your cities.

If you lose all of your cities or the aliens get too close, the level is lost and you will have to try again.

There are 20 levels. Try to save them all with as few fails as possible.