Hello ctdabomb,
I tested your theme and it's pretty nice. The biggest issue is that it's hard to see the difference between normal and shadow block. Also the background looks a bit unfinished mostly because the white in mountains' edges. Maybe a paper/rock texture would make it even more interesting? The theme is looking very promissing and I would like to see the final version.
P.S. are you working on a levelpack too? That would be great.