I don't think the underlying game is fun or interesting and the blockchain shtick is the only thing it's got going for it which imho is a detractive quality. I think its only merit is that it sated the author's interests.
Sure, it's possible. But I would add that any on-chain game would be equally good, if not better by not being on the chain. I dare anyone to show me a game that is only good by existing on the blockchain.
I'll wait.