More specifically water. Or at least I think it's supposed to be water. Also I apologise for getting stuck at that elevator like a muppet, totally got the wrong idea from step one :). But my stupidity aside, I like this game quite a lot. I feel sort of like I missed the boat on this one playing it a couple months after it came out, but ah well better late than never.
So far the puzzles are fairly simple, mostly to let me get used to all of the mechanics and I expect that it'll dole out more complicated stuff as I get further and it was pretty awesome to see the giant over elaborate spike machine of death at the end. I'm aware there are more gadgets to play around with beyond just the single magnety fluro maker thing that I have right now.