Visual Update

 - Added different achievement menu that is more visual.
 - Added different stage select menu that is more visual.
 - Fixed incorrect "how to play" keyboard controls.
- Modified play menu to have new game for the save slots instead of empty save slots, followed by new game.
- Added new game to immediately start the new game.
- Fixed new game initials entry not showing.
- Added sounds to initials entry.
- Added quit to pause menu, rather than only being on the title screen.
 - Added quit confirmation.
- Added new tileset to be used in a few levels.
- Modified starts of various levels to look different.

 - Fixed grades always being F at the end of a level if you didn't have the HUD grade showing.
- Added achievement for "No Riders."