I like the substrate, looks very natural. If you want to get that sand off your driftwood a turkey baster works pretty well.

I notice you have a Tiger Lotus, very cool plant. I grew one once from a cheapo bulb pack I picked up at PetSmart.. it went from bulb to a monstrous plant in an insanely very quickly amount of time. I am not aquascaping expert but maybe you could try to make more of a sloped look with the substrate? It has a nicer look when sloped also it forces detritus to roll down and usually clump into one area (makes for easy vacuuming/cleaning).