No story line, just a puzzle game. You need to get three blocks of different colors to their end point using the rules of the game.
The blocks can roll tile by tile but only on their own color, on white tiles, or over each other to form bridges. The levels I played seemed to offer a bit of a challenge, not too difficult yet not too trivial.
Not sure about other content you may encounter later. The Steam intro video seem to show a colored laser beam so there's at least something else to discover.
Verdict: The game looks a bit simplistic, but made up for it by simply being a good puzzle game. Better put on your thinking cap because you're in for a challenge.
Familiarity: Never played it before