Artillery Game Final Update

Added a LOT more polish for UI, aesthetics, sound effects, you name it! There would be too much to name what I did on top of my head, but here are a few things that were updated:

-Added a western-styled setting for the game

-new sound effects for the 2 new guns

-did I mention there are 2 NEW guns?

-to toggle guns, hit Q if you're player 1, P if you're player 2

-some guns come with a special effect that will have to be toggled while the bullet is in the air (ex: the scatter shot will have to be manually be split) To do this it is the Z key for player 1, ? key for player 2

-more UI options and polish

-instructions on how to play the game in-game

-DESTRUCTIBLE WALLS! (with sound!)

-DESTRUCTIBLE CRATES! (also with sound!)