Interceptor Demo update 2020-09-06

Update-2020-09-06:

• Recompiled the game in GBDK-2020. The game should:
  • Throw fewer errors in BGB and other debugging emulators
    • The errors in question almost never affect the game when running on live hardware
  • Run smoother, allow implementation of more enemies in future updates
  • Use less space within the ROM file, allowing for future content to be added in more easily
• Slightly altered armor sprites to make them a little more distinct
• Dying no longer resets the entire game and instead resets the current level from the game over screen
• Fixed code that was only allowing 7 of the 8 allotted bullet slots to be used in memory
• Fixed a rare bug where a bullet would appear on screen, but never move, usually the first one fired