Prisms
Bend coloured laser beams with mirrors and prisms so every target lights in exactly the right colour.
Easy
One beam, two mirrors. Rotate the mirrors to steer the beam onto its target. No colour-mixing yet.
1 beam~1 minuteStart EasyMedium
Two beams that mix. Drag the mirrors onto the board and turn them so each target lights in the right colour.
2 beams · mixing~3 minutesStart MediumHard
Three beams, a prism and a splitter. Steer one beam through them to mix with the other two and light every target.
3 beams · prism + splitter~6 minutesStart Hard
?How to play
- 1Each emitter fires a coloured beam. A mirror bends a beam 90°; a prism and a splitter redirect or divide it.
- 2Tap a piece to spin it. On Medium and Hard you also drag the tray mirrors onto the highlighted cells. Route the beams so each target is reached.
- 3A target lights only when it receives exactly its colour – shown by the letter inside it (R G B Y C M). Too many colours (e.g. white into a yellow target) is wrong.
- 4Colours add where beams meet on a target:
Tip:some beams run dead-straight and can't be deflected – they're the fixed colour supply. Steer the beam you can control so it meets them on the target and mixes to the right colour.
Colour-blind mode: a Colour-blind button in the game patterns each beam (red solid, green dashed, blue dotted) and labels every emitter with its colour letter. Targets always show their letter (R G B Y C M).