Good little game, so far. I haven't finished it yet, but unlike some of the other commenters, I have the brains to figure out what to do, without needing someone to hold my hand every step of the way.
Already working on it, should be ready by the end of January :) You can see progress, and some screenshots here https://twitter.com/targaciej or https://www.facebook.com/rainbowtraingames Thanks for playing!
You have to idle. (And by that I mean wait for the next update, sorry!)