very good first entry ...... i think the greenish shadow should emanate from the door (not over the columns), and the columns look a bit flat on the pavement.
i would play more with the orb too , since is the centerpiece of the title.
overall looks pretty good.... and good luck

The 'classic' columns in conjunction with the 'modern' green orb is very intriguing. Gornats has good advice. Try varying up the idea a bit. Maybe make a brighter glow behind the orb and then a larger, less bright glow behind that. Maybe lighten the top portion of the dark doorway a bit with a soft transition to dark. These are merely small ideas. I like what you've done author. Nice first entry!

Thanks for the comments guys, I will end up re-posting it probably then. Do I leave this one or do I delete it?

How do I delete this?

you can replace it with a blank image, redflag it and ask mods to remove it, or just switch it with a new updated version if you are planning to change it. Go to "My Stuff" at the top and click on "my contest entries" then find your entry and "edit" and replace it with the new one by clicking on "browse" and then "submit" at bottom.

Thanks

This looks cool! like the entrance to a magical castle good job!