Update 1.2 Pizzaloadable Content and fixes

- Fixed the audio mixing
- Added a sequence of levels that take place after the credits
- Added a new weapon, "The Headcannon"
- Made ALL enemy projectiles reflectable
- Pizza Time slows down enemy bullets as well
- Removed enemy death animations so that reflected projectiles can track more enemies
- Changed some backgrounds
- New Boss enemy

I'll most likely be adding another weapon and more levels tomorrow.