How to play

1. 1

   Start with one row

   Every puzzle opens with a single row and a rule, something like "West → East by longitude". Your job is to arrange the entities along that line in the right order.

2. 2

   Place one entity at a time

   You get one entity at a time from the bank at the bottom. Tap a slot to drop it there, tap a filled slot to swap it out, or drag things around if you prefer.

3. 3

   More lines open up as you go

   Once the first row is full, a new line branches off from one of the slots, with its own ordering rule. Fill that one and another might appear. The puzzle grows from the inside out.

4. 4

   Intersections do double duty

   Where two lines cross, a single entity has to satisfy both rules at once. Getting those right is the real challenge.

5. 5

   Check your work

   Once every slot is filled, hit Check. Green means correct, red means try again. You can check as many times as you need, but fewer checks means a better score.