Our pick of the top iPhone and iPad game of the week - Block Droppin' Blitz

Sometimes a puzzle game comes along that knocks you for six. Other times a puzzle game comes along and slides onto your homescreen and, almost without you noticing, becomes the kind of game you go back to over and over again. Block Droppin' Blitz definitely fits into the latter category. It's a game that's sort of two games. Your screen is split in half - at the top you've got coloured blocks, at the bottom you've got a clear space. Match a group of four blocks of the same colour and they'll drop down to the bottom part of the screen. You need to make horizontal lines, like in Tetris, to clear them from the lower portion. It's a really clever idea, and while it is another match-stuff puzzl…

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