Thank you so much for the kind comment!
I actually did plan to support different color schemes so that everyone can pick a scheme that works for them, but I ran out of time for the game jam. The code is already prepared for that though, so you can play around with it if you want: https://github.com/winston-yallow/mosaic-client/blob/main/src/board/Board.gd#L40 (The colors are for background, foreground, fragment color a, b and c in this order)
The linux build actually was the only one I tested as I use linux too :D