MostFun Lumen - Unlimited Play Version - Version 1 MostFun.com is proud to bring you an unlimited-play version of this game as part of its collection of popular games! Strategically align emitters, laser beams, and mirrors to solve complex and challenging online puzzles. Once you get the hang of Lumen, take the next step and create your own mind-boggling puzzles for other online gamers to solve!