Show us some more, as it stands this image is a little flat. It looks like it just has a midground and a background, with nothing linking the two and a very flat composition.
You also have two huge areas of shadow competing for your attention.
this was done for the daily sketch group on conceptart.org. the topic was "HUGE BLUE-GREY ANCIENT ALIEN GOD STATUE W/ RED GLOW CRYSTALS ." it's an environment sketch, so i thought it would be appropriate here.