We just published an update to the game that introduces a new map and includes a tutorial.
The new map is called Silo and is very different from the previous maps, as it's vertically oriented. It's still in prototype phase, so let us know what you think of this one, as we're looking forward to hearing your feedback!
The new tutorial can be selected from the main menu, and will auto-start for new players. You can check it out if you like, but if you already know the basics of the game it's probably not that interesting ;)