Love your work, thanks much for submitting! It is so rare that I get work from creative types in the US -- how refreshing! :-) THe mountain in your submitted artwork comes to too much of a point; you are welcome to submit another sample that is shaped more like Mt. Rainier which has a flat top. I am going to reject these entries now, but only for that reason. I would encourage you to re-submit.
Anything you can to to make the circle more like the rim of the end of a lens would be interesting.
I just want to let you know, you may rank up to five designers, which will allow the top five to keep submitting during this "top 5" portion of the contest. Of course, if you have already narrowed the decision to fewer than five there is no obligation to allow others to submit.