The objective is to light up checkpoints by bouncing, coloring, andmaneuvering a laser beam through obstacles. Although puzzles may seemeasy at first sight, they can be quite a challenge. The careful attentionto detail and the colorful graphics make Lumen a joy to play. Playing Lumen To play Lumen you must first load a puzzle by clicking on the "LoadPuzzle" button at the top of the window. Lumen comes with a folder ofmultiple puzzles to play, with more on the way. Once a puzzle has beenloaded, use the pieces to the left to "activate" all the checkpoints onthe board by directing a laser of the same color through it. First, picka laser emitter and drag it onto the grid. Laser emitters can only beplaced on the outside edge of the board, and only one emitter can beplaced at a time. Once the laser has been placed, use mirrors to bouncethat beam to the checkpoints. Click on a mirror to rotate it. Next placefilters on the grid to combine colors and activate differently coloredcheckpoints. An RGB color key is provided below Blue + Green = Turquoise Green + Red = Yellow Red + Blue = Violet Blue + Green + Red = White