It's a good start, but it's not yet a suitable place for a tree frog to live, if you ask me. Add more climbing space, more hiding space. Basically, just more plants, plants and plants (fake are ok if you really have something against live ones). A feeding bowl is something I recommend (but it's not necessary), since this reduces the risk for impaction and makes the monitoring of food-intake easier.

On a final note, Velcro is a kick-*** name.