circloO: Physics Platformer

Contains adsIn-app purchases
4.7
15.4K reviews
Content rating
Everyone
1M+
Downloads
Content rating
Everyone
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About this game

circloO is a colorful physics platformer in a growing circle. This app version contains all levels from circloO and circloO 2, plus brand-new bonus levels! There's also a level editor and already over 1500 levels created by players like you!

You're a small ball rolling around in a round level. Collect circles to grow the level circle. As it grows, everything stays in the level, so you'll have to avoid and use obstacles in everchanging ways. For example, a platform that was first very useful to gain height, may prove to be a challenging obstacle after the level has grown!

You can only move left and right, so you'll want to use features of the level carefully to jump and gain height. You'll discover all sorts of physics features, such as changing gravity, a sea of tiny blocks, strange contraptions and even planets with a gravity field. In challenging parts, you'll find yourself fully immersed, pressing the screen as hard as you can trying to get closer to finally collecting that next circle. But don't worry: you'll never have to start over a level, so you can always try again really quickly! And I can guarantee you'll feel amazing once you finally manage it! 😊

circloO Complete features:
- Lots of cool physics features: ropes, pulleys, changing gravity and much more! I've included quite a few mechanics for you to discover. 😃
- 76 fun, growing, ever more challenging levels! Can you complete the six almost-but-not-quite-impossible Hard Mode levels?
- All levels from circloO 2 and the original circloO, plus 28 brand-new levels!
- Plus thousands of awesome player created levels!
- Unique physics puzzles in each level.
- Great music and sound effects by Stijn Cappetijn.
- Minimalist and colorful graphics.
- The game will take most players two to three hours to complete. Level times are saved, so you can try to beat your own highscores and speedrun levels after that! Plus play the thousands of player-built levels!
- There's also a level editor! Build your own levels with a huge amount of options!
- Relaxing yet challenging physics puzzle platforming fun!

I'm very happy that circloO 2 won the first Crazy Games developer contest out of 200 contestants! It was also third in the Kongregate contest of November 2018. You may remember it from CoolMath Games as well.

Reviews:
"It’s an excellent game that has a very playful and chilled out approach to the gameplay, whilst also featuring some wonderfully intricate level design. A very impressive puzzle platformer you’ll really want to roll with. Highly recommended." - Free Game Planet
"The difficulty scales upwards nicely and you're constantly rewarded for learning new skills as these always come up in future levels." - Jayisgames

The game contains occasional ads after a level, which can be removed with a one-time in-app purchase, which supports development as well.

Have fun and I'm happy to hear what you think!
Updated on
Jul 17, 2026
Available on
Android, Windows

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
This app may collect these data types
App activity, App info and performance, and Device or other IDs
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.7
15K reviews
Collin
July 5, 2026
You have to control a ball to collect the circles. Pay attention to the controls. Each level has it's own challenges and some are difficult. This has good design. I love the calming music in the background. This is a great game, every 2-3 levels complete there is a ad. This is the most best time killing platformer game out there. It is NOT similar to the one online, this has WAY more levels than the online version. Please download it and try it out, you WILL NOT regret downloading this game.
5 people found this review helpful
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Chris D
April 20, 2024
It's fun to figure out how to get around the levels. I get frustrated with puzzles sometimes, but was able to figure them out eventually. It requires some dexterity, timing, and trial and error. I like the guides that appear when you've been trying to pass for a while, but they're only on early levels. Some levels were pretty precise on when to switch directions so that was a bit frustrating, but there were guides for most (maybe all) of those. I'm excited to try out the player-made levels
69 people found this review helpful
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Ethan Estep
April 19, 2024
So entertaining! I've been playing the levels over and over again and without fail, they are enjoyable. There are very few adds, and the game runs very smooth. This is one of very few mobile games that aren't bought out by big, greepy companies like Voodoo and it's a nice change of pace from the laggy, pay to win games. The ads are true to the game, and Florian did a very good job on this game overall!
24 people found this review helpful
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What’s new

Thanks for playing circloO! This update adds the following features to the level editor:
- New special connection types: Set Speed, Apply Impulse, Trigger and Trigger Random
- There's a new trigger type that allows you to directly respond to player input (left/right/both keys) or trigger every frame!
- You can now set defaults for each special connection type
- There are two special searches that allow you to find some unplayed levels