Diagnose Android Game Bug

I need a fresh pair of eyes on my Android game, Math Tug of War (Google Play link: https://play.google.com/store/apps/details?id=com.oubacode.arqon). There is a stubborn issue hiding somewhere in the gameplay loop and I have not been able to pin it down... (Budget: $10000 - $20000 USD, Jobs: Android, Debugging, Game Development, Game Programming, Game Testing, Java, Mobile App Development, Mobile App Testing)