I've finally managed to make the game compatible with the new version of Unity, with the new update I managed to make use of a few new Unity features:

• Added bloom effect to accent luminescent objects
• Added anti-aliasing effect to smooth transition between the gun and environment
• Added motion blurring effect that activates when player is moving very fast
• Added tone mapping to make the environments brighter and more colorful

Additionally I adjusted the lighting to meet the new effects;
All in all a huge improvement to the graphics!