pretty nice

for a first animation, this looks too good to be one

For a first animation I give you five stars!

noobies like you earn five star

Well, it's quite short, and the shakycam is kinda annoying. I'm all for cool and energetic camera movements in madness, but when they're only done for kills and the rest of the time the camera is static, they just get annoying. The musc was also over-the-top and just too much. The plot wasn't explqined very well in that short time, the guy was hiding and seemed to sneak up on a guy he had some sort of arrangement with and pointed toward the gun. These things all seem unnecessary if this was arranged beforehand. The guy was also shaking, but seemed quite stable in battle. Then again, he did grab a rock frantically at first. It was just hard to tell with the camera shaking. You also need bullet lines, they make things clearer. The background outside was cool though. Please also credit whoever made the music and try to use non-copyrighted/ permitted tracks. Unless you made it.
Overall, it's too short, and we're simply not provided with enough story or information. Not much happens. It's cool ot have a mysterious plot, but try to provide some clues and show some things. But not bad at all if it really is your first animation, it was fluid and there was some nice action and strategy involved.