A lovely little game that more people should have played.
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Pros:
+ Clever: The concept is original and well-executed, and having to think in truly 3D terms can take some getting used to. Some of the puzzles are fiendishly clever, but never unfair, and you'll feel like an idiot when you finally realize where you've been going wrong!
+ Difficulty Curve: The game takes its time introducing you to new ideas and features, and you'll never feel overwhelmed as a result - of course, once you think you've seen and done it all, you'll swiftly be put in your place...
Cons:
- Multiplayer: The 2-player mode, a kind of Simon-says memory game, is pretty disappointing, and nowhere near as fun as single player.
- Longveity: It will take you a long, long time to finish it, and you'll feel like a genius when you do, but once it's done there's not a great amount to keep you coming back, apart from perhaps convincing yourself it wasn't a fluke...
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If M.C. Escher came up with a puzzle game, this would be it. Great concept, great design: it's not overly ambitious, but it is original, and it does what it sets out to do perfectly. Give it a go if you want to stretch your brain!