Not bad, but not correct either
So...right after you say they are the "best snipers" they proceed to shoot a bullet through what looks like an old prop from the original star trek. Then they have a rifle that locks onto their target? I don't get it...
Anyway, for the drawing, I think you should pick up some anatomy books and try to reference from those, so your characters look at least more proportional, if you don't want them to look realistic (keeping it more cartoonish).
Not much else to comment here, this was still better than a lot of the movies posted here, but it needs some serious fine-tuning.