Anniversary Update

Much, much later than intended, enjoy the huge Anniversary Update.

• Updated Unity to 2020.3.15f2, and updated packages
• Uncompressed sword swing sound
• Rebuilt Water Act 1 and part of Act 2 with unstretched assets
• Restored Aqua's intended height
• Rewritten Aqua's animation, including restoring her intended jumping animation
• Zoomed out the camera in Water Act 2, and attached the background to the camera
• Removed splash screen
• Fixed/improved final scene formatting
• Improved title screen formatting
• Added an icon
• Increased gravity in Water Act 2