Your heart doesn't seem to be in it. Don't fall for sunk-cost. Cut your losses and go for something where polish and quick iteration is the highest priority (removing all fluff like configuration files and clean and structured code). Take inspiration from Notch's live coding sessions. Try to make each version essentially "finished", without large set of "boring grunt work" weighing your motivation down (like polish is weighing you down now). Don't stop iterating on the basics until you and a few friends (online or offline) really love playing with it. Focus on pure childish joy, and be brutally honest with yourself if you don't feel it. Don't hide away for months without getting user feedback. On the bright side, now you have a chance to learn from your mistakes! Good luck!