Sounds simple, but it will have you scratching your head in frustration in short order. Choose from four skill levels and try 10 puzzle layouts per level. Click on a lit or unlit spot and the spot will reverse, as well as the adjacent spots. Each time you turn one spot off you may be turning three others on. There is a timer and a move counter to see how well you're doing.
The interface is colorful and sounds accompany gameplay, but there are no hints, tips, or strategy advice. Note: This free software contains advertising technology that will occasionally use your Internet connection to receive and display ads.