A sliding block puzzle game with the puzzle’s tiles forming the building blocks of a 5x5 grid. Construct a circuit to illuminate bulbs between electrical terminals.

The puzzle is complete when you can simultaneously illuminate three bulbs. The bulbs light when they form part of an electrical path between the two terminals after switching the circuit’s power on. As an added complication bulbs have to be in parallel to illuminate, so keep your bulbs on separate electrical paths as bulbs in series will not light up. Avoid short circuits and light all the bulbs before the power gauge is depleted. Puzzle power continually dissipates - so be quick!

Slide the rows and columns on the board by tapping edge tiles. A spare tile is inserted where you tap and the tile that is displaced by the sliding row or column becomes your new spare tile. Rotate the spare before using it by tapping it.