Not really. If this was the post on HN I'm sure people would be more sympathetic because it leaves out all the important details, like the fact that he actually received €20k for it and the pompous idea that he's one of the creators of Minecraft.
He is, undoubtedly, one of the people who worked on a part of the game, yes. That counts as "helping create the game". And claiming to have "helped create the game" is not the same as claiming to be "the creator" of the game.
