Removed buy and throw buttons

• Walking into a shop item now buys it
  
• Removed Caltrops
  
• Replaced money multiplier system with a combo meter
  
• Added difficulty levels
  1. Base difficulty
     
  2. You have -2 health and bandages cost +100%
     
  3. Items have 50% less durability
     
  4. Enemies can't hurt each other
     
  5. Enemy bullets move 50% faster
     
  
  

Known Issues

• Some walls do not render properly