Hi GaunaZX, glad you liked it. Do you have a suggestion on how to expand it? Thanks.
I think having an alternate objective, such as in chess, where you have to capture a certain piece or even some marked pieces in order to win would put a little twist. Also, since the pieces all have movement to not get stuck, you could easily play with the form and shape of the board to make something interesting. Thought, as it is, it's already good and would be cool to see if you take the idea further afterwards.