v1.1.0 Mouse Update!

Changes:

• Added mouse controls, they can be toggled in settings
• Added option to use down button to drop the pebble (hold button becomes the old drop button)
• Added "M" as menu button so web version doesn't exit fullscreen with "Esc" button
• Moved audio settings to their own tab
• Added a separate audio slider for ambience
• Added new cursor
• Added new splash screen

Bug fixes:

• Mouse wasn't working for the menu in speedrun mode
• There was no sound effect when exiting gamemode menu