While it is new code (ie not an emulation layer on an older computer's version of the game), Lode Runner Classic has a definite retro feel, retaining the blocky pixel graphics and simple graphical design to your smartphone. This is in contrast to the Xbox Live Arcade for the Xbox Console, which is definitely spruced up to 21st Century standards. That said, I love the retro look and it will focus the player's minds on the 150 levels included in the app.
Controls are through an on-screen d-pad, which gives you controls both for movement and the digging action to let you burrow into the levels.
As always, a trial version is available in the Windows Marketplace and the AAWP App Directory as well as the full price purchase.