Heres a quick snap. Not loving the water effect, may redo completely with a different technique and repaint this as concrete.
Looking pretty good! I can see what you mean about the water-effect, though. Feels like it should be darker and murkier.I love the concept for the board, though. Seems like great fun to play on!
I like the concept and color, but I think you need a ton more gloss of choice over the top to make it look smoother and more watery.