Below, you'll see any text that was highlighted with comments from the reviewer.
The beginning was a great hook. Then you mention the weariness and the empty streets, and I really start paying attention!
This main character thinks. And we get to see those thoughts. That's what makes him alive. (I use the masculine pronoun because the character seems masculine to me. Like a young man in his late teens, 17-19.) He also seems alive because he goofs up with the seagull. He makes mistakes, just like any other human.
You could insert a flashback to give some background information, because I keep wondering who you're talking about. Why are the main character and his friend tired? Do they have any names? Names are important. A character is so much more real when he has a name.
I feel like it takes place in an abandoned city somewhere in the north, like Sweden, in spring or summer. I would certainly consider mentioning hills, trees, what kind of buildings there are, or any other points of interest.
They should keep at it because this is a good story, that's why! I like the mystery, it certainly adds interest to the story. You did a good job of showing the character's thoughts, and I like the humor you added as well, keeps the story from being too serious.
I really liked reading this, but I was left with some pesky questions that detracted from my reading experience. Also, you need to add paragraphs! It makes the story run together and get confusing when you don't have paragraphs to separate main ideas and different speakers. Other than that, this was enjoyable to read! Thank you for writing this! Any chance of a sequel?