- Added global leaderboard functionality via Google Play Games Services.
- Implemented sign-in process for Google Play Games and score submission.
- Updated UI to include leaderboard buttons in both MainActivity and HighScoresActivity.
- Enhanced README to document new online features and leaderboard integration.
- Added necessary dependencies in build.gradle and updated AndroidManifest.xml for Google Play Games configuration.
- Introduced a new control for holding pieces with a swipe up gesture.
- Added multiple theme options with a Random Mode that changes themes automatically after clearing lines.
- Updated README to reflect new controls and visual features.
- Incremented version code and updated version name in build.gradle.
- Adjusted title and high score positioning based on screen orientation in TitleScreen.kt.
- Added "Enter Name" prompt in high score entry layout for better user experience.
