Did you play Monument Valley (above left), the gorgeous perspective-based puzzler from last year? It costs $4 on Google Play / iTunes, and is one of 2014's best games. And now you can get it for free. Sort of. You see, Ketchapp, the studio behind Threes! knock-off 2048 is at it again. With Skyward (above right), the developer's created a game that bears more than a passing resemblance to ustwo Studio's Apple Design Award winner. Whereas Monument Valley is a relaxing, almost zen-like experience that's more about logic puzzles than twitch reactions, Skyward is a shallow attempt at disguising a tired Flappy Bird clone by wrapping it in pastel colors and M.C. Escher-like aesthetics. Oh, and it's full of obtrusive ads for retirement planning and compact cars -- junk that's thankfully missing from Monument Valley.