An aware guy in the past

Welcome to the future ! Our civilisation has avanced to a new stage in evolution ! Cars now fly and houses look like UFOs ! It's amazing ! But also very boring... that's why you go back to the past because life was just better back then. But of course, with you comes all the knowledge of your time, and it may have some consequences...

Controls :

WASD to move
Aim with the mouse
Attack with the left click
Change weapon with the scroll wheel
Open the shop menu by pressing B

PS: A rusty cupboard makes a nice HONK !