Das verrückte Licht

In this little strategy game your task is to activate all lights on the
playfield. The problem is when you select a cell, all adjacent cells change
status (off->on or on->off) as well. So you have to think ahead what cells
need to be activated in order to switch the entire playfield on. The game
offers 20 levels, ranging from 3×3 to 22×22, and a counter which counts the
number of your moves.

Das verrückte Licht