The Mirage Site
The Mirage Site is a puzzle game with lasers, mirrors, and color filters. Different colors of laser have different effects.
There are 3 large areas of puzzles, one area has challenging puzzles that focus on each color effect: red, green, and blue. The borders of the puzzles can sometimes be broken, creating additional meta-puzzles to find bonus stars.
These color-beam mechanics were later recreated in Roody:2d. Roody:2d also adds unique mechanics to yellow, cyan, and magenta beams.
Walkthrough
Spoilers, obviously
If you squint, you might recognize the red, green, and blue lasers as the laser, funnel, and lightbridge from Portal 2.