This game appears to have shown up on Steam. It’s unclear that it’s official and just this game or if it’s someone trying to pass the game off.
If the Steam game is unofficial and someone trying to take credit (and potentially make money) from your efforts I suggest reporting them under the DMCA (which Steam will take seriously).
Here’s the link to the game: https://store.steampowered.com/app/3474950/Decorum/