Looks great. One small suggestion i would make. Your crypts in the front middle i would move a little further back inbetween the rocks you have placed rather nicely. Then the hairgrass in the front right i would take out and separate into smaller clumps. The bunch on the far left could easily be split into several clumps. You'll get a fuller 'lawn' effect quicker and easier this way. Other than that i like it alot!
What specs do you have, eg lighting, CO2, ferts?
I see rummynose in there, what else do you keep in there?