Generally very, very little. You can generally take the number of Steam reviews on a game and multiply by 50 to get a rough, ballpark idea of how many sales the game has made. Considering this game has 3 reviews on Steam and costs $6, it’s unlikely the game has made over $1000 on that platform.

That doesn’t mean it’s not worth making games, though! I’ve released two mobile games, still updating the second one, and although they’re a far cry from being profitable vs. the amount of time I’ve put into them, I still find the process and result very fulfilling.