OCO is a minimalist's dream. The circular level design is really clever and forces you to think about timing in a different way than standard 2D platformers. The 'one-button' controls are deceptively simple, but the puzzles quickly become complex as you deal with gravity and rotating hazards.
The best part of OCO is the community levels. There is a nearly endless supply of content, and the built-in level editor is surprisingly powerful. The soundtrack is also procedurally generated based on your actions, which makes every successful run sound like a unique piece of electronic music.
Dinsun here. OCO is a game for people who think most games are too loud. It’s stripped down to the bone—one button, circles, and colors. I can appreciate the efficiency. The way the sound syncs with your jumps is well-executed, and some of the later puzzles actually require a bit of brainpower. It's a 'zen' game, which is usually code for 'boring,' but OCO keeps the pressure on with move-count limits.
My gripe is that it feels more like an app than a game. There's no weight to anything. You jump, you loop, you finish. The community levels are a nice touch, but quality varies wildly. It's great for five minutes, but I find my mind wandering after ten. It lacks a hook that makes me want to come back for anything other than a quick distraction. Clean, but sterile.
Performance: Perfect performance; almost zero load times.
Buy if: You enjoy minimalist puzzle games and want a relaxing, rhythmic experience.
Skip if: You need a story, characters, or varied mechanics to stay engaged.
Available on: iPhone, iPad, iPod
Version 2-3-04Tue Aug 11 2026
- Minor bug fixes
“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 over 7000 fast-paced platforming puzzles
FEATURES
• Simple one-touch controls
• Complex challenging puzzles
• Precision platforming
• 7000 hand-selected player-created levels
• Create and share levels using OCO jpg levels system
• Beautiful minimal design
• Procedurally-generated soundtrack for every level
• Built-in editor
• Daily challenges
• 'Discord' community
• ‘Perfect solution’ challenges for all levels
• 46 achievements
AWARDS
• Finalist 'Pocket Gamer People’s Choice Award', 2020
• Runner-up ‘Big Indie Pitch’, Develop, Brighton, 2018
• Finalist ‘Very Big Indie Pitch’ Pocket Gamer Connects, London, 2017
Requires iOS 15.0 or later. Compatible with iPhone, iPad, and iPod touch.“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 over 7000 fast-paced platforming puzzles
FEATURES
• Simple one-touch controls
• Complex challenging puzzles
• Precision platforming
• 7000 hand-selected player-created levels
• Create and share levels using OCO jpg levels system
• Beautiful minimal design
• Procedurally-generated soundtrack for every level
• Built-in editor
• Daily challenges
• 'Discord' community
• ‘Perfect solution’ challenges for all levels
• 46 achievements
AWARDS
• Finalist 'Pocket Gamer People’s Choice Award', 2020
• Runner-up ‘Big Indie Pitch’, Develop, Brighton, 2018
• Finalist ‘Very Big Indie Pitch’ Pocket Gamer Connects, London, 2017




















OCO is a visually stunning, minimalist puzzle-platformer where you control a small square navigating circular, rotating worlds. With simple one-touch controls, you must time your jumps to collect yellow bits while avoiding red hazards. The game features 150 levels in its main campaign, a robust level editor, and a global community that has created thousands of additional challenges. The experience is heightened by a procedural soundtrack that reacts to your every move.
Simple one-touch controls
Procedural audio and minimalist visuals
150+ hand-crafted levels
Cross-platform global leaderboards
Analysis of the game's minimalist appeal.
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Tap the screen to jump as your character automatically moves along the rotating environment. Collect all bits in the fewest jumps possible to earn perfect scores.
Yes, OCO includes a full level editor that allows you to create, share, and play levels made by the community.