Updated to iOS 13 SDK

* Simplify user interface
* Fix sound issue

* Fix UI glitches and stability issues
* 64-bit compatible

* Fix crash when changing theme to classic

* Fix crash after showing interstitial ad
* Add classic theme
* Enable iAd

* Add shadow around images for better clarity

* New animal & fruit themes
* New sound effects

* Three new levels (now it's 18 levels in total)
* Replenish hint by one every level up
* Ability to save progress
* Smoother animation