Level
1
Best
—
Time
40
Tap cells to place / or \ mirrors
Place mirrors on the grid to redirect the laser from the source to the target.
A green source on one edge fires a laser into a 6×6 grid. A red target sits on another edge. Some cells are walls that block the beam. From level 3 a grey, circled fixed mirror may also appear: it already bends the beam and cannot be changed.
Tap any empty cell to cycle a mirror through three states: empty → / → \ → empty.
/ mirror: right-bound light bounces up; left bounces down; up bounces right; down bounces left.
\ mirror: right bounces down; left bounces up; up bounces left; down bounces right.
When the laser enters the edge cell next to the red target (from any side), the level is cleared and the next one auto-generates. Your score is levels cleared × 10,000 plus the tenths of a second left on the clock at each clear, so between two runs that reach the same level the faster one ranks higher.
Each level has a time limit: 40 seconds for the first, 0.8 seconds less for every level after. Run out of time and the run ends; clear all 40 levels to finish. Every level is checked to be solvable, and to need at least one mirror, before you see it.
Goal: clear as many levels as you can, as fast as you can.
Do not place mirrors at random — trace the laser's actual path from the source and see where it naturally travels, then work out where it first needs to turn to head toward the target. Equally useful is working backwards from the red target: which direction must the beam arrive from, and therefore which cell needs a mirror angled to deliver it there?
Remember exactly how each mirror bends light: a "/" sends rightward light up and downward light left, while a "\" sends rightward light down and upward light left. Hold those two rules in mind and you can plan a turn without trial and error. Walls block the beam, so use them as fixed constraints that often force a single sensible route; from level 3 a grey, circled fixed mirror may already turn the beam for you, and you cannot change it. The beam does not need to arrive from a particular direction — it only has to enter the cell beside the red target. When the path almost connects, look for the one cell where a single mirror redirects the beam the last leg to the target rather than rebuilding the whole chain.