Puzzle & Strategy
Photon Detective
Infer three hidden mirrors from laser entry/exit pairs. Mark each mirror orientation and verify your deduction.
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Controls:
Tap border ports to probe. Tap cells to cycle empty, / and backslash. Check verifies the full solution; two hints are available.
On mobile, transparent on-screen buttons appear, and you can switch between arrows and mouse/touch from the control button.
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How to play
- Press "Play now" to open the game screen.
- Use the keyboard or the on-screen touch buttons.
- Your high score is saved on your device automatically.
- Press ⛶ for full screen and ✖ to go back.
Frequently asked questions
Is the game free?
Yes, completely free with no sign-up or download.
Does it work on mobile?
Yes, with transparent touch buttons; landscape works best for fast games.
Where is my score saved?
In your browser on your device only; it is never sent to a server.