Added prototype game

Added a snippet of the game in it's current state but not considered a demo but more so a prototype to try out.

Added and modified the following

• Night vision item
• Gas Mask item
• New weapon (n/a in prototype)
  • Player can swap two weapons
• different reload system for the type of weapon
• Starting screen allows for the user to choose their bonus stat but sacrifice other stats
• Key pad password system for one door
• prototype in entering dark and lit areas
• Leveling the player up in STR (strength) only