Space Panic

At first, he's toying around with another action game.

Uh, we may remember from the first episode, if not, just go back and listen to it, that Door Door is kind of an action puzzle game that combines elements of several other games, like Dig Dug and Space Panic and Pac-Man into a new package.

So at first, he's looking at doing another action game, not a sequel to Door Door, but just more action.

But then he realizes, you know, there's a lot of action games on the Family Computer, and there were.