Updated TODOs
Added high score notification
Updated TODO list
Persist audio state
Added basic tutorial
Improved tutorial internals
Replaced instructions menu with tutorial
Added more detail to the tutorial
Refactored tutorial display code
Added animations to the tutorial
Updated TODO
Suppress score effect at the start of a game
Fixed flashing when exiting a game
New joystick graphics
Fixed some class and variable names
Fixed moving directly right with the touch joystick
Allow space and escape to end a game as well
Refactored mouse input in GameLayer
Only add tutorial when it will be shown
Updated TODO