A very pleasant deal to have stumbled upon. The game was sitting in the wishilist since months, and seems like a good time to snag it. Reviews are very positive, and the game is rated pretty high.
https://play.google.com/store/apps/details?id=nz.co.codepoint.minimetro&hl=en
https://play.google.com/store/apps/details?id=nz.co.codepoint.minimetro&hl=en