That ending hits hard. I don't know what the exact rules of "anything he wants" are, but it feels like this one wish, making everything the way it used to be, isn't possible. Maybe it's possible and just not revealed, but the heaviness of that scene makes me think it's not (or it's like one person in the comments says and the story is a permanent loop).

I really like how they fit the complexity of human relationships in a 10-minute film. Being best friends in school but then losing touch (at 4:08, Oktana implies that he hasn't seen Poteto in four years, which is related to Poteto's illness, I think?), the feeling of being "replaced" with other people (like Oktana's friend / partner?), and the overwhelming pain of loss that Poteto feels despite his powers at the end. Of course, there's plenty of silliness ("I'm destroying the world because he called my ears goofy"), but beyond that silliness, there's raw, human emotion that isn't always rational, like Poteto's destructive behaviour when he realises that his best friend has a "new" life. I wasn't really sure what was going on during the first half of this film, but the ending pulls it together very nicely.