Just played 0.6, and I think it's great - I can't see any major problems with it, just a few nit-picks. The rippling pipes look a little cartoon-like I guess, I seem to remember tom and jerry squirting each other with hoses that did that. Perhaps movement of fluid in the pipework could be represented by the occasional leak or visible flow, maybe a dripping joint or a spray from a puncture. I suppose visible flow could be spray from the end of a pipe or transparent sections such as those of Pulse.
The steam engine is brilliant, but the governor appears to rotate too slowly and wobbles, the needle of the pressure gauge changes shape as it moves, and there is no valve shaft - there is normally a reciprocating rod driven by an eccentric on the crank shaft to operate a sliding valve that changes the piston direction. Also an engine of that type would probably need a support bearing on the joint between the piston rod and connecting rod. In this image
http://www.hals.org/imagegallery/104angle.jpg the support bearing is the block in front of the piston and the valve rod is the one behind it.
Finally the plants in the engine room have a rather jerky movement, I think that a slow, smooth movement (such as that of the palm leaves in Hamunaptra) would look better.
and I can't pick those painsaws up either!Well, I think that's enough nit-picking for one morning

Sokolov is rapidly becoming one of my favorite maps, great work!
@Jhaa: I'll take two.