Optimization Update

It's been a little over a year since I released this game, and I figured it was high-time for some small, but necessary improvements. 

• Optimized lighting to help improve framerate on all machines
• Reduced amount of animated particles on Mac version
• Changed skybox to remove that weird blue halo at the bottom of the horizon
• Darkened fog for extra spookiness

Huge thank you to everyone that's played this game!