Just played, here are some impressions. It's worth the download, first off. I immediately saw many flaws, however. One is the compete lack of leaderboards. And not only that, there's no saved high score at all. I'm 68 btw, second try.
The music is a small upbeat loop. The goal is to stomp buildings to save the natural Mother Earth. Points for buildings, although no penalty for stomping trees. Right now it's playable, but barely. To Nimblebit: Add GC, add powerups, add a few difficulty modes, and make the background a little less bland. That's just off the top of my head, I'd love to see more. I see Mega Panda Pro selling very well should it ever be created (or if you just update this and make it paid).