“OCO is an exceptionally clever one-touch puzzle-platformer” 8/10 Pocket Gamer
“Gloriously addictive and intelligent puzzles” 8/10 Touch Arcade

Immerse yourself in the beautiful audio-visual world of OCO.

Use simple one-touch controls to launch, rush, crash, glide, warp, and hang as you solve 135 hand-crafted puzzles.

Create and share your own designs using the built-in editor and explore hundreds of user-generated levels online.


• Simple one-touch controls
• Complex challenging puzzles
• Precision platforming
• 135 unique levels
• Beautiful minimal design
• Procedurally-generated soundtrack for every level
• Built-in editor (create levels and challenge friends to complete them!)
• Online community
• Hundreds of user-generated levels
• Daily challenges
• ‘Perfect solution’ challenges for all levels


• Runner-up ‘Big Indie Pitch’, Develop, Brighton, 2018
• Finalist ‘Very Big Indie Pitch’ Pocket Gamer Connects, London, 2017

What’s New

Version 1.017

'New Pro' explore page added (promoting high quality creator levels)
Minor bug fixes

Ratings and Reviews

4.5 out of 5
448 Ratings

448 Ratings

That one Demoman ,

Phenomenal App

The simple creativity of this app is something that I miss from mobile games, I've created many levels and the simple fact that I can without spending money on a "full game" is amazing. The ads don't bother me at all, as they aren't obtrusive to gameplay, or often!

It breaks my heart that I can't open the app now, I was looking forward to seeing how many people played my 7 levels this morning. Other people have been having similar issues, and I trust the developers are working on a solution.

Considering what can pass as a "game" these days, this app far surpasses almost anything else on the free market.

MrSkinnyFingers ,

Amazing, but make sure you use WiFi

This game is perfectly paradoxical for its simplicity is what makes it entertaining. This game takes a different spin to puzzlers out there, and I can’t say that I know any other game like it. However, there appears to be a bug that hinders our fun. If you plan to take this game on the road, I hope you have a portable WiFi router because it cannot function without WiFi, not even Cellular Data can suffice as a replacement. May you please, the developers of this game, find the issue and eradicate it so this delicacy may not be tarnished.

Developer Response ,

Hi MrSkinnyFingers. We had some server issues yesterday which should be improved today. Please let us know if you have any more issues. Thanks.

Angrynoodle1 ,


I don’t usually review things on the app store, but dang is this good! As a mario maker addict I can say that this level editor is awesome. The only issue I have is with the frequency of ads when playing levels, but even then, they will never play while editing one and I respect that! controls are tight, the standard levels are awesome and the level creator is simple and deep. I’m amazed this is free.


94.3 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
In-App Purchases
  1. x 2000 bits + NO ADS $0.99
  2. NO ADS Free
  3. Remove ads $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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