BERZERK VECTREX

You have been sent to a building infested with robots and must do your best to clean it up. Each room has a number of walls in the middle, which restrict your movement. There will be a number of bad guys in the room - on the first screens they might be stationary and not shooting at you, but after a few levels they become able to shoot in multiple directions. You can shoot them in 8 directions, but you cannot shoot diagonally while moving. There are holes on the side of each room, through which you exit, before or after clearing the room (there is a bonus for clearance). You get an extra life for every 2000 points.