Hey man, I'm also participating in this contest.... a little bit of advice for this particular logo. Is always a good option to try your logo in 300 x 300 pixels and 76 x 76 pixels.... This way you can see how your design would behave in different contexts and you'll be able to determinate which changes could be made.
For this one i would try to change the font and maybe place it differently so it can be readable from far away.

I'm also making some changes in my design so that it can get closer to the company's idea... if you have any feeedback i would apreciate it.