You know how to stack things on top of other things. We all do. You've been doing it since you could wrap your infant fingers around wooden blocks.
Games have not made a secret of the fact that arranging items in a tower is both a) pleasing, and b) easy to do on a touchscreen.
And now, Drei. In Drei you must stack objects - square blocks, usually, but sometimes circles come out to play and roll off things - up to a certain point on the screen, at which point the level is complete and you're given a whole new bundle of blocks to stack.
You interact with the monochrome world through a colourful avatar - I had a multicoloured octopode chap, but you can select others - to which you leash the blocks and haul them around the screen.
Control isn't imprecise exactly, but it does take some practice to steer yourself through the arena without making mistakes.
New and improvedWhat's different about it? Two things. Firstly, the blocks in Drei have a definite, satisfying physicality to them. Try to lift a heavy block and your little avatar will struggle and strain to wrench it off the ground.
Wobble back and forth while you're holding building materials and the brick will swing underneath you like a wrecking ball. The weight of the elements gives interaction a real feeling of heft, and it's often used to great effect in the challenges themselves.
Secondly, there's multiplayer. To complete some levels you'll need to find someone else playing online to help out. While there's a definite appeal to it, the later levels are locked behind stages that must be completed with more than one player.
After around an hour of play, I was stuck with nothing to do as I couldn't find anyone online. The option to play later levels without having to team up would have been an excellent addition.
However, if you can guarantee that someone can play with you there's a lot to like here, both in terms of streamlined Swiss presentation and elegant gameplay.