I'm afraid this comes off to me as a snapshot, and I think any text added if it were a real postcard might be lost in the busy background. Those silver poled are interesting. I assume they are a form of a handrail?
Very simple and elegant - the shapes and forms plus the unigue and soft colors are a good selection. The exposure seems a little over done and could have used treatment in curves to bring them out a little more - that was a side effect of the odd lighting angle. Might have been better to change position and angle just a little.
Where is Meadowland Amphitheather and that is not how you spell amphitheater. It is also very much like a snap shot and shows really nothing that would be on a post card I dont think. I voted this low for those reasons.