Update from 1.1 to 1.2

Details of changes

• To address the Unity security issue (CVE-2025-59489) Upgraded Unity version from 2021.3.18f1 to 6000.2.7f2
• Enabled display of currently selected song title
• Added ability to stop sound sphere rotation
• Added mute function 
• Added reload function to add other songs while a song is playing
• Added 'Disco Sepia' as default song