The developers of Hexy, Fifth Ace, want to offer you something a little extra and give you the opportunity to play Hexy over Wifi. To do this you need a second copy of Hexy though. So for the next 20 people that send in their iTunes receipt showing their purchase of Hexy, they will send you back a promo code good for a second copy of Hexy to give to a friend.
This is only good for the next 20 people and only open to users of the US iTunes App Store. Forward your iTunes receipt to firstname.lastname@example.org.