WallWar

It's a sensory overload! WALLWAR's fast paced action bombards you with brilliant colors and a symphony of sounds. A barrier of light falls first, the robot's first defense. Then it's a race to knock out your opponent's glowing plasma field and release the Balls of Death to finish off your foe. WALLWAR - It started out as a game!
For one or two players

Source:

Back of Box - Atari 8-bit (US)