Version 10.6 (October 30, 2020):
+ Small upgrade.
Version 10.5 (September 4, 2020):
+ Fixed error of user-id registration.
Version 10.4 (5/28/2020):
+ Fixed some bugs.
+ Added feature "View ads - get Ruby".
Version 10.2 (October 24, 2019):
+ Fixed loading level error on Android 9.
Version 10.1 (October 2):
+ Fixed Ruby asynchronous error.
Version 9.9 (June 5):
+ Fixed loading levels above 100.
Version 9.7 (April 22):
+ Fixed screen sharing error.
Version 9.6:
+ Upgrade the interface, fix some small bugs.