looks sweet dude, specially the light hitting that foot xD
You could try bringin some darker shadows into the foreground tentacles to push the depth. The orb in the background also reads more like a flattened sphereoid at the moment, i think whether you want it to be like that or a full sphere you could put some more defined reflections and highlights to emphasise it's form: https://images-na.ssl-images-amazon.com/images/I/41DmgRIRPOL._UY395_.jpg
