as said in the title, adding the games to steam would not only attract a lot more attention to the game from new people but would also make it easier for fans to buy the game. the easiest way to do this is probably make both games in pack or in a collection, with like a simple tittle screen that just boots up the game from whichever you pick. another way would be releasing the games separated, with it's benefit being able to make the free version of the games as demos and ability to buy only one or the other, but loses a lot of charm. still, even if you don't, the games are still great! keep making games, y'all are amazing :)