Man too bad you spent so much time in other stuff and not in the MAIN CHARACTER, the COLOSSUS D:!!!
You must always finish the main thing in your drawing, then you can add details to the environment and stuff.
I can say that when I saw the small view of this drawing, I was thinking "WOW this looks really awesome, letīs see!!!". I feel a little dessapointed when looking the monster, I can see if have a lack of details, specially the skin... ANYWAY!!!!!!! This is a wonderful and great drawing, and you should be proud, those are two of the more beautiful and reallistic trees I have even seen, the ground and grass looks beautiful too. The angle of camera is perfect and the red glowing at the bakground adds a lot to the atmosphere.
I wish I could see this amazing drawing totally finished, hope you can complete it (not for the contest) but for you and for all the people who see this great pic and wants some more of it!!!
Keep it up and good luck!!! Hope my comment doesnīt look offensive D:!
By unfinished, do you meen humans? 'Cause otherwise other things look pretty well done. I can clearly see why you could go crazy with everything you mentioned - those trees, rocs and grass are EXTREMELY detailed The colossal beast looks impressive too - I especially like how his further parts starts to fade into the rediness/orangeness Also six hands and chains give him kind of boost of epicness