Great entry with a lot of polish. Not sure if it's a staple of the genre but I really liked the reload on right click mechanic. Coupled with the ability to quickly change weapons it made for some interesting moments where a quick decision was necessary.
Once I got the hang of it was releasing whole clips of shotgun ammo into oncoming hordes and felt great!
Will say that the camera movement following the mouse was a bit too quick for me, small issue though.
Great game, well done!