It looks good to me. I don't have any objection to the rocks as long as they are big enough so they won't get ingested by your fbt's. I use the sphagnum moss in mine and have had no issue. However I use the pressed moss and peel off a layer of it the size of what I'm covering with it and then hydrate it without tearing it up or fluffing it. So I don't see any danger of them ingesting it. However if it's fluffed up, then maybe it could be an issue.

As for the water.......It's better than none. However you'll have to change it quite often. Probably every other day it not every day. Despite what the maker says about putting water in it, I'd still try. Maybe their concern was filling it completely and the glass was not sized to provide strength for 10 gallons of water. But 1 gallon might be okay. If it does leak, then maybe you can find a rectangular tuppaware dish or cut the bottom out of something that fits.

I certainly agree on cobras caution about the lights. In a small viv, a reptile light or "basking" light can quickly get things too hot and may likely be too bright for their eyes. Remember they aren't tropical and are happy in cool viv's.