Je suis d'accord avec Theoden, faudrait faire virevolter les cartouches vides dans les airs, ça rendrait mieux. C'est intéressant de voir toutes ces choses, manquerait plus qu'un jeu complet. 

I think it would look even better if you give the empty shells a full rotation while they are flying in the air.

Since they are just two pixels it should take just a minute to edit it.

He stands rather stiff when he isn't doing anything and maybe makea frame between the standing and the shooting with make it smoother

 very nice animation

Might add a reload/cock at the end. It'll make the loop more believeable.