I love the elevated sections. It gives a real choice, do I climb or go round it..... It reminds me of the, now sadly out of production, terraclips streets of malifaux which I only realised was out there once it was out of stock everywhere.
Did you find the pva and sand warped the board at all? I used pva to glue textured wall paper to some foam board and it curled up like a banana😠