Match 3 Game Board - Concept

I'm starting a new piece centered more around Game UI that's more painted and less vector than my previous set.  This is for a Match 3 game that I loosely devised a few months ago.  I have the Air and Earth boards concepted.  Earth is has a more completed set of concept drawings but I really wanted to start with the Air board for some reason.  

Below you'll find the concept sketch and how far along I am with the painted piece.  

Yes, I know that four across may not be the best option for a match 3 but I'm trying to stay focused more on the design and feel of the board than worry about if it 100% functionally!