Hi,
I would also suggest that you make one for free, just so that user can get an idea of what to expect, and level required to understand how it's made. This will definitly improve your sales, coupled with coupons campaign like you are are doing now.
also, which ones are made with PlayMaker? I am confused. you mention some requires "Coding", I am wondering what that means, would they be 100% c# or hybrid?
Bye,
Jean