It is a game with 12 static assets.
I feel somewhat bad about my comment now though, it's delightful to play with something you made and that's the point, and I'm glad google is able to ship small fun demonstrations of stuff like that via google labs.
And I know I'm in the weeds by replying more.
But damn it, my reply was to "Look how easily they just fabricated 100% of a game's assets" which is a statement that really implies a lot more than generating 12 images! Chess is a game with 12 static images. You can call these dynamic, that's fine, but the context matters.