[jamager]

Mechanics can't be copyrighted, but the board gaming community can smell rip offs from afar and don't particularly appreciates them.

Besides, it's going to be madness to advertise that you have the game X on your platform but can't use the name or any artwork.

If I were the OP, i'd try to gear this towards publishers and make it as easy as possible to create functional prototypes. They need to iterate countless times on prototypes, one little change at a time, and this could be a huge time saver for them, facilitate playtasting, etc...