Update v1.1

Changes:

• Added Option Menu to adjust volume options, video/resolution options, and customize game color
• Added a cooldown to firing and make the fire button hold-able
• Added letterboxing when the game is played in non 16:9 resolutions to ensure full visibility
• Make box unable to rotate and more affected by shooting
• Fix some UI elements not being affected by post-processing
• Post-level menu only now shows up when playing from level select