If I may ask you... do the people, who attend your college, also possess artistic skills you have?
I wish you good luck for the contest (I think your chances of winning are high). If anything could be improved here... I think you could have added some shading around the small objects (Such as the small trees), and continued detailing some of the objects in making a great overall scheme (Such as the cave edges more "sharp" and the clouds more realistic).
I've always thought India is really full of extraordinary talents. It's only too bad the rest of the world doesn't know it, maybe because there is a lack of internet connections in there. You are welcome!!
It's some motto of reggae music... babylon and ghettos are often associated to what one has to fight to free their lifes from the oppression...I thought your lost world was inspired by what we know about Babylonian civilization.