The rules are simple. There are four movable pieces on a hexagonal grid, each cell having a random set of arrows. Each piece can move according to the arrows under the other pieces—but not under itself. The goal: to move pieces on top of each other, eliminating them, until only one piece remains.
There are four levels of difficulty. The harder the level, the fewer arrows present. At the hardest level, many cells have no arrows at all.
Each game starts with a new, randomly generated collection of arrows. Never the same game twice.