Fractal Cave

Place crystals in the cave to guide the floating lights to the tunnels matching their color.

A crystal attracts any lights that share its color components, and then sends them in the direction the crystal points. (For example, a red crystal sends red, yellow, magenta, and white lights. A white crystal sends all light colors.)

You can change a crystal's direction at any time by clicking on it and then pointing it at the target, but you can't move the crystal. You must delete it and place a new one.

The challenge of the game is to construct a structure of crystals to send each color of light to the correct tunnel. Since no crystals affect only one color, you'll need to send lights between multiple crystals to separate the colors. For example, given red or yellow lights, you could use a red crystal to send them both to a green crystal. The green crystal will then send just the yellow lights to their tunnel, and you can put another red crystal nearby that will send just the red lights to their tunnel, since any yellow lights will already be gone. For more colors, you could use a cyan crystal to send anything not red to other crystals, and then place a red crystal just past the cyan one to send only the red lights to their tunnel.

Each group of floating lights comes in a wave every 2 minutes, and the types of lights are shown in the table beforehand so you can prepare. Click "Next" at the bottom to skip the timer.