Multiple Tracks in Music Maker

In This Update:

• Can make music using multiple tracks
• Fixed Undo/Redo
• Fix issue with crackly sound when starting playback
• Can change tempo on mobile
• Basic loading screen
• Click the whale for Solo/All tracks playback

Things relevant to this update to still improve:

• Improved track selector UI
• Undo/Redo on mobile
• Undo/Redo explanation of what's changed
• Better loading screen
• More sfx