One laser, a few targets, a handful of mirrors. Light every amber target using as few mirrors as you can. Every level hides a minimum, found by a computer search, and you get a star only if you match it.
Level
Mirrors left0
Par (minimum)0
Targets lit0/0
Stars0
Tap or click a free square to cycle: mirror /, mirror \, empty. Keys: arrows to move, Space to cycle, R reset, N next.
Dark blocks stop the beam. Fixed grey mirrors cannot move. A prism (diamond) splits the beam: one ray goes straight on, one turns like a / mirror.
Budget is par plus one. Par gives 3 stars, one over gives 2, and peeking at the par answer caps the level at 1 star.