Do you have anything that's not just an .exe? Which software did you use to build it?
I'm awfully suspicious and typically won't play those, sorry!
I complied it in inno setup. Don't worry, I'm not going to put a virus on a contest submission (talk about shooting myself in the foot). I formatted it as an exe for the sake of professionalism. If you need proof, I've received 13 ratings so far and no one's complained about getting malware.