While time flies the CouchFox was busy too - checkout this list of improvements and bugfixes:
(if your suggestion is not part of it, stay tuned for the next update - it will also come with more achievement rewards)

Improvements:

• Cardbacks: you can change cardbacks now! to start off there is one new cardback for all players and an extra one to unlock if you win a total of 10 games in any mode

• cardbacks can be switched on the start page

• Simplified mode selection: all the modes can now be set and changed from the start page

• when in spider mode, the pyramid still lets you change the mode directly, but will ask for confirmation

Bugfixes:

• shuffling in Klondike easy-mode now not only shows a pretty animation but actually does shuffle the card stack

• the pyramid and the gramophone have been rearranged to not interfere with the cards in play

• in spider mode cards facing down are no longer treated as part of a finished set - and thus are no longer automatically removed

hope it helps
enjoy
the CouchFox