I have updated the build with a few much needed fixes and changes, outlined below:
Removed PSX Shader Effect.
Raised Scale of Enemies/Textures so they appear sooner in the player view.
Migrated to v1.6 of Easy FPS Editor
Fixed the Enemy Duplication glitch on save/load
Fixed Audio Settings crash bug.
Changed Bow enemies to projectile instead of hitscan.
Made the final boss more challenging.