On a mobile device, the board is supposed to be resized to entirely fit on the screen. I suppose this could make things too small for the large games that you sometimes play. Is that what is happening? Or is the board even smaller than it needs to be to fit on the screen?
The main problem is that when rendering boards using PNG Image. JPG Image, or GIF Image, the board is smaller than the hitboxes for selecting squares, causing the highlights on the board to become misaligned with the board image.
As for the board size, I think the best option is to have something for disabling fitting the board to the screen in the GC Edit Preset Form (which is off by default).
The main problem is that when rendering boards using PNG Image. JPG Image, or GIF Image, the board is smaller than the hitboxes for selecting squares, causing the highlights on the board to become misaligned with the board image.
As for the board size, I think the best option is to have something for disabling fitting the board to the screen in the GC Edit Preset Form (which is off by default).