Maintenance update

Maintenance build

* Support for iPhoneX and 11 screens
* Bug fixes for iOS13
* Fix glitch in character animation in the ending scene
* Better pairing of game controllers

Fix missing sound effects caused by a bug in iOS10.

* Bug Fix: music and sound were playing even in Silent Mode
* Bug Fix: fix crash on iPad when trying to share the last screenshot
* Save checkpoints after clearing every round so you can continue in case the app is terminated

* Add Credits achievement
* Spawn fruits instead of power ups when the power-up level is already maxed-up.
* Fix bug that allowed for infinite tennis balls in some situations.