Minneapolis Parks Pin & Pin-Backer

I created an enamel pin derived from a poster I designed for Posters for Parks 2016. I am in process of finalizing the design for the pin backer, to be blind-debossed into white paper. Going to sell the pins and donate 25% of profits for MPLS parks. Any thoughts on the design of the pin backer before I take it to print would be awesome! Photography by me.