ID this computer game.

In the Tom Hanks movie “Big”, he is shown playing a computer game as a kid, and can’t seem to figure out how to pass a certain puzzle. For some reason,every once in a while I start to wonder, just what game is he playing? Does anyone recognize it?

Thanks in Advance.

My instinct was that it was made up for the movie, and as far as I can see I’m correct. I’m told this appears in the credits:

There is no credit to an actual computer game as there probably would be if it were real.

Anyone own the film and want to check the credits?