LOL, yeah, I'm on a roll tonight.
First the Armor Attack guessing game and now DigDug. LOL
To be honest, my first impression was Centipede. But Centipede does not have an over-under door.
So the next guess was DigDug. But it could also be Kangaroo. But no one in their right mind would convert a 'Roo. Am I right?
I dunno, i think you got it again. The bloomed out pic I posted is the only one available, and you can see the slightest hint of speaker slots up there. This looks right. Control panel area is right for sure.