klik.

Turn off every light.

One click changes everything. In klik., every tile you touch ripples outward, toggling itself and its four neighbors between light and dark. Your goal is simple: make every tile go dark. How you get there is the puzzle.

What begins as an intuitive one-click solution quickly unfolds into something deeper. Patterns emerge. Moves cascade. And the satisfaction of watching an entire board go dark in the perfect sequence never gets old.

50 Hand-Crafted Levels

Three tiers of puzzles, each designed to push your thinking a little further.

Beginner eases you in without a single word of tutorial. Click, observe, learn.
Intermediate introduces layouts where brute force won't cut it. You'll need to think ahead.
Expert demands real strategy. Some puzzles sit at the mathematical limit of what a 5x5 grid can produce.

Every level is guaranteed solvable. No guessing. No luck. Pure logic.

Chase the Perfect Solution

Every level tracks your moves against the optimal solution. Earn up to 3 stars by solving at par, or just focus on clearing the board at your own pace. A built-in hint system is there when you need it, and undo lets you unwind mistakes without starting over.
Built for Comfort

Full keyboard and controller support

Steam Cloud saves across all your devices

Runs on practically anything

Settings for colorblind mode, reduced motion, and screen flash sensitivity

A Quiet Game

klik. is inspired by Japanese ink wash painting. No flashy particle effects. No timers. No pressure. Just you, the board, and the click of each tile falling into place. Play for five minutes between meetings or spend an evening chasing 3 stars on every level.

Made by Hand

klik. was designed, programmed, and produced by HydroYT, with music by Nick Lam.