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Monument Valley is visually gorgeous, and I like a lot about it. However it has zero depth as a game- you can easily move through it by tapping randomly on the screen. Also it's built by ustwo, and while they're lovely people, they're far from a small one man shop (they have hundreds of employees in several offices worldwide and know what they're doing when it comes to marketing). I don't think Monument Valley is a s…
It's a puzzle-box/adventure-game-type experience — mostly a beautiful and interesting toy to fiddle with in your hands. Some people enjoy that, others don't. I personally love it, and I can see that a lot of App Store gamers do too. In that particular genre, it's a gem! From what I've read in interviews, the team was comprised of about 6 people, and they didn't do any marketing or advertising. Another recent example…
As far as the game experience, it's far from being in the best of its genre (and I know many game designers who agree on that point). People like it because it's artsy and lends itself nicely to casual play, which is fine. But whatever, that's besides the point- which is that it's far from a one man indie success.