A sincere thanks to everybody that entered my competition! There are clearly some very talented designers out there and I applaud all of your efforts. There were a lot of designs that were very close to the top, so I'm sorry to those who missed out. I wish you all the best with your future efforts!
Thanks for the entries - I've updated the description to include colour scheme and provide some examples of what I mean by 'natural'. So far SubodhStha is closest to the mark in terms of colours and simplicity, but I don't want the logo to include 'PAM'.