You don't need to submit your project files. You just have to have them onhand in case Yoyo themselves ask for them (to make sure they're made in GMS). Just compile your game like you normally would and submit that.
oh shoot… should I remove mine then? I submitted the yyz along with the zip… I guess the risk is someone stealing my code? Frankly I鈥檇 imagine they take one look and run the other way anyway… 馃槄