This is a decent map, but it seems like the non-sand tiles have just sort of been placed randomly. It's not mono-sandy enough to seem deserty but it's not busy enough to seem like anything else, so it's sort of stuck in a strange place. The layout is good, but my suggestion would be to get rid of some of the grass and a few of the rocks from around the top level of the map and put a few more grassy tiles and pebbles in the pit (especially around the middle layer). I know there isn't much going on with this chip, so why not bring some tiles over from another one? It's got enough going on for this map, but I imagine a whole area with nothing but these tiles might start to get boringo.