Fixes and Tweaks

- Added level name pop-up when level starts.

 - Fixed signs having a solid color background.
 - Fixed rare crash after initials are entered.
 - Fixed issues with new "Secondhand" level.
 - Removed the auto look camera.
 - Modified "Spike Hike" level to be much later in the game.
 - Fixed certain things not appearing on certain difficulties.
 - Fixed "Watch Your Head" crane not working.
 - Fixed "Shadowy Horizon" secret not counting as a secret.
 - Added checkpoints to "Watch Your Head" level
 - Added more object falling signs to "Magnetic Cargo Conveyor" level.
 - Fixed secret in "Material Mover" level not being secret.
 - Fixed spikes making the HUD transparent when they overlap.
 - Added better performance to the stage select.

 - Added HUD sub-section to settings.
- Added new sprite to signs that looks more different from the checkpoint.
- Modified heart meter to shrink hearts rather than trim them.
- Added extra level "Secondhand" with some bits of long levels.
- Fixed enemies doing too much damage.
- Fixed best times from saving empty entries before they are played.