> ...
> what would it cost ?
I can't imagine. There is a thread with orders on the forum.
If no one volunteers to develop it, you can view the ready-made game sources and buy the one you need.
These two links are just to show where you can buy a ready-made game, especially the second store has a lot of games on Construct 3.
https://www.construct.net/en/game-assets/games/domain-licenses/tile-match-3831
https://codecanyon.net/item/candy-dash-2-html5-game/52389917
Thanks