Shoot the aliens behind cover. Your bullets bounce off the walls to allow you to shoot the aliens behind cover. You have limited shots so aim carefully.
Tap and drag where you want the cannon to shoot, then tap on the cannon to shoot and watch your bullet bounce off of walls and hit the alien. If you missed make adjustments if you miss the first shot. Be careful as you have limited amount of shots.
Cost: 0 Jewels
Earn: 0 Jewels