Alien ships have invaded the Earth's atmosphere and are plunging toward the ocean. It's up to you to shoot them down before they land.
Alien ships have sophisticated shields, so only bullets of matching color can down them. Your charging team works hard to make sure you always have necessary ammo. Sometimes they provide you with a golden bullet penetrating shields of any color.
Drag and release or push the floating bullets to take out the flying saucers. Watch the sea level--the more ships that reach the water, the higher it rises. If too many space ships land, the Earth and life as we know it is doomed!
