Currently there's no way to figure out whose turn it is to play, which can be a bit frustrating.
Ideas:
Place a "phantom" mark (cross or circle) under the cursor on hover where a mark would be placed for the active player -> This is cool because it doesn't clutter the UI which I want to avoid so the game still works as well on a small mobile screen, however this only works with a mouse and not with a touchscreen where there is no hover!
Currently there's no way to figure out whose turn it is to play, which can be a bit frustrating.
Ideas: