Purity Update

Done:

• Update falling platforms and related add new collision detection
• Update powerups class.
• Update room file format to include save points and platforms.
• Update powerups file to act as a partial save file as well. Not as bad as it sounds. I already had it set up that way and just ended up making a few new functions.
• Add sounds for powerups.
• Add powerups.
• Add menu with continue, reload, new game, and exit.
  

Todo:

• Update gun class.
• Add health bar.
  
• Make new font file.
  
• Update room file format to include guns and potential other things.
• Make BMP to Map converter.