Basics
Select the tiles on the left and click on the grid to make your puzzle.
Right click on a tile to view the details, here yo can assign a group to the tile, you can change the rotation and you can lock a tile (a locked tile can't be rotated by the player).
Tile types
The Generators are the beginning of the Puzzle, they generate a current that propagate trough the other tiles.
The Goals are the end point of the Puzzle, they are the obgectives to be reached by the Players.
The Triggers are used to activate other group of tiles, you can assign a group to trigger in the details panel.
Groups
Tile can be assigned to a group either from the menu on the left or from the details.
All group except group 0 start invisible and can be activated using a Trigger tile.