Fun game, reminds me of those addictive phone apps with a similar premise but in 2D. I got to level 8 and I cant seem to progress any further (though people have written about lvl 9 and lvl 100). The idea of making a loop is a fascinating concept. I did notice that the bulbs and battery had certain placement requirements (e.g. placed on the edge of a box always facing outside, each one having a certain length, which may constrain possible puzzle potential if there are more levels). I like the simplicity of the art and the soothing, relaxing music.