i see some very nice concepts. you have nice ideas, but.. you really need to work on your depth and flow. for example: making a wall off your bg is just an effect and doesn't add anything then just it being a flat wall made by an effect. It would have been better to blur and sharpen parts, or make parts brighter and darker etc etc..
it is impossible to give good comment on sigs like this. if you want good comment, then post them one by one.

keep 'm coming man!!