No contact info is given for the developers, so this is the only way to let them know. The ad free version is listed as free to day on AppGratis and the App Store, but when I downloaded & attempted to upgrade to ad-free, the App Store keeps attempting to charge me--so I'm stuck with a version polluted with ads. Otherwise, the graphics are gorgeous & I'm sure I'd love playing it--will change the review if there's a resolution.