Behind the Build | Klocki by Maciej Targoni
At first glance, Klocki looks like a classic pipe puzzle game. Then a new mechanic shows up, and the whole board changes. Indie developer Maciej Targoni of Rainbow Train built this relaxing puzzle game around one question. How many ideas can a simple line puzzle hold? Now you can play Klocki instantly in your browser on VIVERSE. In this Behind the Build post, Maciej shares how it started and what he learned by bringing it to the web.
Meet the Game
Klocki is a relaxing puzzle game about connecting lines. “Klocki” means “blocks” in Polish. Your task is simple: connect all the lines on the board. But that’s not all!
At first, you just swap tiles until the lines connect. Then new things show up: tiles that rotate, blocks that slide, and lines that connect and separate. Every few levels, there’s a new idea, and later the puzzles turn into small 3D shapes.
No ads, no time limits, no scores. Calm music and sounds by Wojciech Wasiak. Just relaxing puzzles.
Klocki has 97% positive reviews on Steam, and Apple picked it as one of the best mobile games of 2016.
To a friend I’d say: you connect lines, and the game keeps surprising you.
How to Play Klocki
Klocki runs instantly in your browser on VIVERSE, on a phone or a computer. It’s best in landscape, so turn your phone sideways. Portrait works too.
- Start: sign in with your VIVERSE account on the title screen. Your progress is saved to your account. Click Play to continue from your last level.
- Play: click or tap tiles on the board. Some swap, some rotate, some slide.
- Next level: when all the lines are connected, tap once more to go on.
Tip for first-time players: when a new kind of tile shows up, just click it and watch what it does. A wrong move costs you nothing, so try things.
Behind the Build
Klocki came out in 2016.
I was prototyping different things, and I found this: you swap tiles and connect lines. It was kind of interesting. But I thought this was just a pipe game, a bit different. It’s been done many times before. Then I thought, OK, I’ll add one more feature and see how they work together. I added rotating lines, then sliding blocks, then a few more mechanics. And it turned out this simple connecting became a journey, and it got more and more interesting. The prototype was cool, so I went with it 🙂
So, I decided to see how many mechanics I could fit in and still keep it interesting. I kept going until the idea ran out. It was enough for a lot of levels. From the first prototype to release it took about a year. I like to take my time and not rush. Some ideas need time. The game was well received, which was nice.
I made it in Unity. Graphics in GIMP, like always. Music and sounds are by Wojciech Wasiak.
The hardest problems were technical, like always for me. For example, rotating whole planes in different 3D directions, using levers in different positions. I couldn’t write it myself, so I had to hire someone for that part.
Klocki was my second game on VIVERSE, after Hook 2. Same setup: a web build, VIVERSE sign-in, and cloud save. I also made it playable in portrait, so on a phone you don’t have to turn it. But landscape is still better.
What surprised me: Klocki is ten years old, and now you can play it in a phone browser on VIVERSE. And web players are different. On Steam, people find your game on purpose. On the web, they click in and decide in a few seconds. The VIVERSE team asked me to make the start of Klocki clearer. They also asked me to show that you need to tap after a level is done. Small changes, but they help.
What’s Next
On VIVERSE, you can also play Hook 2, my puzzle game about unhooking hooks. Overwords:Infinity, a word puzzle game, is coming to VIVERSE next.
Right now I’m working on wormin, a new puzzle game about a snake. You can wishlist wormin on Steam.
Byline, Bio and Links
Byline: Maciej Targoni, Rainbow Train
Bio: Maciej Targoni is a game developer from Poland. He makes minimal puzzle games alone, under the name Rainbow Train: Hook, Hook 2, Klocki, PUSH, oO, No.9, Up Left Out, Overwords, NABOKI and Zerko.
Links:
- Website
- Klocki on VIVERSE
- VIVERSE profile
- Klocki on Steam (97% of 1,661 reviews, Oct 2026)
- Klocki on the App Store
- X
- TikTok
Frequently Asked Questions
Klocki is a relaxing puzzle game about connecting lines, made by Maciej Targoni of Rainbow Train. It starts like a classic pipe puzzle game, then adds a new mechanic every few levels. Tiles rotate, blocks slide, and later puzzles turn into small 3D shapes.
“Klocki” means “blocks” in Polish. Maciej Targoni is a game developer from Poland.
Yes. It’s free to play on VIVERSE, right in your browser. Sign in with your VIVERSE account, and your progress saves automatically.
Yes. The game is instant play on VIVERSE, so it runs in your browser on a phone or computer. It plays best in landscape, but portrait works too.
Yes. The game has no ads, no time limits, and no scores. Calm music and sounds by Wojciech Wasiak set the mood, and a wrong move costs you nothing.
The game came out in July 2016. That same year, Apple named it one of the best iPhone games of 2016.
