Just out of curiosity -- can you preserve that intention?

Nothing really stops me from making my own clone of your game, changing only the assets to be my own, other than it's prohibitively time-consuming (i.e. expensive) for me to do so.

If you release the code -- with any license on it at all -- and someone takes it, uses it, creates a similar game, and then changes the code in a sufficiently significant way to be able to claim that it's not "yours" anymore ... what recourse would you have?