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Guide, reflect, and split beams of light to illuminate beacons and advance through new challenges. Follow along using #GoogleIO

Google I/O 2025 puzzle

Guide, reflect, and split beams of light to illuminate beacons and help reveal the Google I/O 2025 date.

Find out this year's event date and get registered

The I/O date is here!

Solve riddles to earn tokens and unlock more worlds!

Bonus worlds

You can reuse game pieces from completed sectors.

Sector complete!

Congrats!

Because you’re incognito, your game progress will not be saved.

You’re incognito

You've completed the blue world and can play it again!

You've completed the cyan world and can play it again!

You've completed the green world and can play it again!

You've completed the magenta world and can play it again!

You've completed the red world and can play it again!

You've completed the tutorial world and can play it again!

You've completed the white world and can play it again!

You've completed the yellow world and can play it again!

This world is currently locked. Solve other worlds to unlock it.

You've unlocked the blue world and can now play it!

You've unlocked the cyan world and can now play it!

You've unlocked the green world and can now play it!

You've unlocked the magenta world and can now play it!

You've unlocked the red world and can now play it!

You've unlocked the tutorial world and can now play it!

You've unlocked the white world and can now play it!

You've unlocked the yellow world and can now play it!

Wow, you’ve unlocked the full CMY spectrum! Your adventure is glowing even brighter!

You’ve illuminated the entire spectrum of light and completed the Google I/O puzzle!

Congrats on solving the RGB worlds! Now the challenge really lights up!

Reset game

Hold and drag to move a piece. Tap or click to rotate.

Control

Beam duplicators duplicate and redirect a laser beam. They can redirect multiple beams simultaneously.

Beam duplicator

When pieces are entangled, rotating one will instantly rotate all its partners.

Entanglement

Color filters add to and change the color of a laser beam.

Color filter

If a piece is grounded, it cannot be moved or rotated.

Grounded

Lanterns illuminate dark sections of the board.

Lanterns

Mirrors reflect laser beams. They can be moved and rotated.

Mirror

Green and blue make cyan. <br />Red and blue make magenta. <br />Red and green make yellow. <br />Red, green and blue combined make white.

Color Mixing

Nodes are powered by laser beams. All nodes must be simultaneously turned on in order to progress.

Node

Prisms split light into red, green and/or blue.

Prism

You completed the {{worldCompleted}} and unlocked more worlds.

Prism Shift