Week 5 Updates

Major updates to the game! 

• There is now an implementation of a moving mist which will add tension to keep the player moving (currently does nothing much but move). 
• There is also two new levels outlined for testing purposes. They are acessed via the scene select menu.
•  A placeholder animation is added to guide further development. 
• There are also a few more physics changes and bug fixes.
• Temporary background art and fonts are now in place for the main menu.