It could have been a lot more than what it is currently.
A supernatural object which has now entranced a girl with itself. No matter how much she tries to lose it, it somehow finds its way back to her. This theme isn't uncommon. But it is pleasing no matter how many times I see it. Sadly this one shot applies the theme in the most vapid way possible.
Firstly it was far too short for any tension to build up. Scares are far off the point, there was nothing I was feeling, tension, happiness, sadness, excitement, anything. Also the relationship between the gun and the girl were not properly explored.
The artstyle and art is possibly the only thing of this one shot which doesn't deserve any harsh criticism because they are good.