The vast majority of software these days just pulls together "internet assets" AKA open source libraries and links it together with a small amount of original coding.
I don't see how this is any different. The game has plenty of original artwork too and the gameplay video I saw demonstrated some functionality.
Its not just the marketing term "blockchain game" that matters. Its the ability to own and freely trade your in-game assets and have your game state immutably inscribed on a properly decentralised blockchain that is the key differentiator from traditional mainstream games.
It is the difference between investing and just spending, between being a producer and being a consumer between being a free person and a sheep. Between true ownership of your efforts and and having your hundreds or thousands of hours of your time and money investment thrown in the toilet by a capricious, censoring big corporate or lost in a buy out or insolvency.