Steer a light across a building at night and switch on its windows. Each one makes the trail longer, and every 5 a new floor puts more of the building in the way. Hit your trail or the building and it's game over.
Windows
Floor
Best
Ready.
How to play
Steer the light to the lit window. Each room you reach stays lit and makes the trail longer. Every 5 windows a new floor adds structure: an outline at first, then solid. Avoid your trail and the building.