So, how do we know you are going to gift the winner the game? I mean, not that I don't trust you, but are they going to give you the add-on first, or are you going to pay them first?
Edit: Also, I think that 1 month is a long time. Maybe you should shorten it to 2 weeks?
Edit2: Would you be okay if I released it now? Or do I have to wait until the contest is over?