Lights - a challenging game of observation and memory

Deceptively simple and surprisingly challenging. The lights will all go out and when they come back on there will be one more light in the pattern than there was on the previous turn, all you have to do is identify the light that was most recently added. Think that sounds easy? The first few turns certainly will be, but the further you get, the more your powers of observation and memory will be put to the test. If you've got the skills to fill the whole screen then you can go again, with longer periods of darkness to challenge your memory and heighten the challenge.