What was the story behind that, I guy was in his house so he shot him. If there was a reason why he was in house then I would understand. And just because you can make good effects, never forget the stop-motion is the most important part. The animation was okay but a bit jerky and fast, next time use the ease in - ease out method. If you don't know what that is watch this tutorial Click. I hope these tips help, and keep practising