Added a new gun: Scar-L (ITS THE GUN FROM FORTNITE!!!)

Changed the gun sounds for the Glock, M4, AK47 and shotgun.

Reworked the main menu and pause menu to make them look better, and also changed the main menu and pause menu sounds when pressing on buttons and stuff

Fixed the shotgun shell jump.. bug

Slightly decreased the blood amount/size for a bit of realism

Fixed the bug where some objects were floating in the city map.

Other minor bug fixes and improvements