WATA Invaders -Atari 2600-

 WATA Invaders by KaeruYojimbo is an action platformer game made for Atari 2600

  

The WATA guy moves back and forth across the top of the screen. Whenever he reaches the edge he adds a game to his wall. Move your character left and right with the joystick and use the fire button to launch a foam dart. Hitting the WATA guy with a dart stuns him momentarily and causes him to drop a rare Atari game. Collect 10 games to get a bonus and start a fresh wave.

 

If your dart hits the wall of games, it will reflect back to you (I did say it was impenetrable after all). Additionally, the WATA Guy will chuck graded games at you in self defense. If either your dart or a graded game hit you, you lose a life. If a graded game lands, it will stay on screen for 4 seconds, acting as a barrier. The game ends when you lose your last life or the WATA Guy finishes his wall. 

Source:  https://forums.atariage.com/topic/345987-wata-invaders/