Looks promising.
Though the effect when he dies is not nice at all, you could've actually make him get killed and it would be better.
Also, you should try a better integration of sound. At the point where he got at the tree is the only part where I heard something, and it was a really weird sound for some reason.
Also, it's a little too short for my tastes, short-action film and all, it can be resumed to a single sentence: "A guy comes and notices someone else with a weapon and then kills him while remaining stealthy". I don't even know why does that guy have a weapon in plain sight and why did he kill him then walk towards the direction he actually came from (Basically just left).
Would like to see something more, though.