Update 0.2.2023-09-03-1

Lots of changes that I finally got around to releasing today:

• Add a (very basic) ending mode.
• Draw a highlight with the user mouses over a piece of correspondence.
• Added level 4. Includes a job that comes in over email.
• Player now starts with $100
• Ensure audio stops correctly.
• Multiple fixes to collision detection. Enemy hit boxes would be in the wrong place when the enemy was facing left. Also, the player's hit box wouldn't move when the player moved.
• Some improvements to the debug code.
• Fix bug where clicking the very edge of a piece of correspondence wouldn't select the job.