Nice review, thank you!
I've heard nothing but good things about Handy Games, and such a gorgeous game, great to have it released as a "premium" one-time purchase!
My main wishlist item for it is iCloud saving and device sync'ing, so that I can have it on the iPhone when out and about, and then kick back in the La-Z-Boy with the iPad when home. I read a few weeks ago that saving to iCloud was a priority for them, but have not yet heard if it's been patched in. I went ahead and picked it up, but have not really dived into it since I couldn't decide which device (iPhone or iPad) to focus on using until device sync'ing arrives.