After playing around on my iPhone 3G I found a Boulder Dash clone called Rocky. It's not only Boulder Dash but a combination of some genres. It's not that expensive: US$ 0,99.
http://www.zenobyte.com/zen/apple/rocky/
http://phobos.apple.com/WebObjects/MZSt ... 70722&mt=8
iPhone Boulder Dash clone: Rocky
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