This is the base of a very cool game! Unfortunately my frame rate seemed to be quite low, and not having my mouse move as I wanted was quite frustrating.
I really like the 1v1 aspect of this game, and the intense feel that the music gives.
I realized quickly that the deadshot ability could be activated infinitely which broke the gameplay a bit haha.
I think this is a very cool idea though - if you add some depth to give extra skill expression, I think this could be very fun. Maybe something like a bar that charges up over time that you can use to either activate deadshot, or use to parry a bullet could be cool.
Nice work!