I would say, being even more pedantic, that the game uses a blockchain (which is just a different type of database) to record in game digital asset ownership. This game could have been made with a normal db taking that roll and would probably run no differently.
He is mentioning and using a blockchain over a normal db for no other reason that it probably helped to secure funding in 2017 as it was a massive tech buzzword at the time.
It could, sure, but I'm positive the only reason he's making it is because of blockchain. I seriously doubt Pete was rolling around a game idea for online real estate separately and just threw blockchain in as a way to get funding.