Louie the construction worker is in a bit of a mess - he's got 100 levels of girders to bolt down, each level a maze of moving steel and tricky walkways. For every girder he bolts down, he's given some money. If he has to un-bolt a girder, more cash is deducted from him than he was awarded - so screw carefully, as they say where I come from.
It's not the hardest puzzle game ever released - the first few levels are a bit of a doddle - but it'll definitely keep you interested, because there are so many different aspects. Quick thinking and a combination of strategy and a logical approach are needed, especially on the later levels, where the layouts run over several complex screens.
It didn't get all that good a reception from Zzap! first time around, but I really enjoyed it. At this price, it's well worth checking out.