Really great game that does two of the most important things right for an FPS: speed and level design. The game takes reference to many older games, mainly through the level design, but also through comments from the player character, but without overding the jokes too much in my opinion. What I like is that it's build with speedrunning in mind, which I think is a cool idea and it really shows in the flow of the gameplay. Don't expect a classical Postal part though, this is more like Viscerafest but on crack. In my opinion this game is a great basis to expand upon, because the movements are smooth and the guns all feel good and distinguished from each other. The only thing I would say is missing is a map editor, maybe some way to add (weapon) mods. Overall highly recommendable if you like fast games that require a good reaction.