Design an Android App Mockup

I am looking for a person to develop our prototype for an Android phone. We already have a prototype made on marvel and have done a couple prototype tests. None of us are designers so we are trying to make our prototype more realistic to the users and differentiate ourselves from everyone else. I will give you our test prototype link to see what we have and will give some instruction on what we we are looking for. (wording change, color change, picture change, etc.). I will need to have a non disclosure agreement form signed before I release any information on the design of the prototype. Also I would need access transferred to the prototype just incase to make changes to any wording/pictures in the near future. I need the prototype done by Saturday October 1st 6 PM and be available to make some changes some days after.