There are a couple of stamping techniques you might want to try (or use again) worth mentioning. The first is using a small to medium sized stamp to create a backing paper. I used a leaf stamp with black ink to mirror the stamping in this case, but you can use Versamark if you want a more subtle effect, or mix and match colours if you prefer brighter!
The main image has been stamped twice - once with green and once, slightly offset with black. If I was re-doing the card I would search out a more olive green, as the lime doesn't quite go with the backing paper, I'd probably use dark grey instead of black and I'd be positioning the stamps a little closer together.
Anyway, as I said, hopefully this effort will inspire you to seek out some stamps and have a go yourself and make a better card! If you do, I'd love to see it!
I have, of course, used Regal products throughout.