One of the most interesting things about it is, how emotional the story turned out.
Why is that? I mean, it's just stick figures.
I suspect that it is because of the very fact that the little figures are so generic.
They could be anyone, which means they could be me. Or you. Or someone you know.
The most emotional art creates the feelings in the viewer, not in the art itself.
This is a great thing to remember, when you are telling a story or making a drawing. When you write or draw about feelings that people relate to, they will connect through their own experiences and memories. You don't have to do that work for them.
This is why stick figures can tell such sad stories.