The game has several areas. In each area there are levels. And each level has several boards.
Each board is a grid where some of the cells have a symbol inside. A line can be drawn on the board, inside the cells. The line can't cross itself.
The first board of a level will have an example line that gives a valid solution for that board.
Underneath the board a set of circles is displayed. Each circle represents a rule for the level. On the last board of the level the circles are replaced with one oval.
The goal of each level is to figure out the rule set and give each board a valid solution. It is possible to switch between the boards freely using the arrows on the side of the screen.
Each area ends with a question mark level. These levels have strange behaviors not seen in other levels and usually do not relate to the theme of the area.