Update for iOS26

Update for iOS 17.0.  Backward compatible to iOS 15.5.

Update for iOS 16

Update for iOS 13 and dark mode

Update for new iOS.
Bug fix

Update for iPhone X
Update for iOS 11

Update for Swift 4
bug fix

Updated instructions

Bug Fix

Update for iOS10 and Swift

Fixed two player with red and green colors.
Reduced the number zero combinations on roll.

Allow students to select their color
Random person starts game

Update icons
Fix dice placement

Updated for iOS7.0

Fix background to fit on 4 inch screen

- added toggle for challenge on/off
- added Strict error checking when not in Challenge mode
- Limit modified play to 10 marbles (simplifies error checking)
- Updated instructions
- Prevent 1 player in free play