Cossing The Sands Patched

This patch solves a couple issues caused by the big update and adds rendering of shadows.

• Fixed a problem that could cause a new game not to start when selected from the main menu.
  
• Fixed textures for some mushroom models in the game.
  
• Fixed an issue that could prevent being able to sell items in a shop.
  
• Added shadows to the game. You'll see objects like trees, rocks, and buildings casting shadows now.