| Core Identity |
| Developer | Kieffer Bros. | Big Duck Games LLC | Kiragames Co., Ltd. | Mobiloids | Fireproof Studios Limited | ustwo games | BitMango, Inc. | Oakever Games |
| Category | Games | Games | Games | Puzzle | Games | Games | Games | Games |
| Platform | iOS, Android | iOS, Android | iOS, Android | iOS, Android | iOS, Android | iOS, Android | iOS, Android | Android, iOS |
| Store Metrics |
| Rating | 4.9 / 5 | 4.8 / 5 | 4.8 / 5 | 4.3 / 5 | 4.8 / 5 | 4.8 / 5 | 4.6 / 5 | 4.7 / 5 |
| Ratings Count | 244 | 392,918 | 37,273 | 455 | 7,493 | 13,941 | 16,771 | 396,242 |
| Price | USD4.99 | Free | Free | Free | $0.99 | $3.99 | Free | Free |
| Release Date | Jun 29, 2010 | Jun 7, 2012 | May 16, 2009 | Feb 15, 2018 | Sep 19, 2012 | Apr 3, 2014 | May 2, 2015 | Nov 9, 2021 |
| Last Updated | Apr 3, 2019 | Jan 16, 2026 | Apr 10, 2026 | Jun 6, 2023 | Feb 23, 2021 | May 8, 2025 | Apr 27, 2026 | Apr 15, 2026 |
| Sentiment & Reviews |
| Sentiment | positive | positive | mixed | - | excellent | positive | positive | mixed |
| Score | 85/100 | 75/100 | 65/100 | - | 88/100 | 75/100 | 75/100 | 45/100 |
| Praises | - Spatial reasoning puzzles provide a challenging yet relaxing experience for players of all ages
- High replay value keeps players returning to solve levels repeatedly over several years
- Minimalist design and high quality audio create an immersive and pleasant puzzle environment
| - Satisfying puzzle mechanics provide a relaxing and addictive mental challenge for daily play
| - Adjustable difficulty settings allow players to tailor the challenge to their personal skill level
| - | - Intricate puzzle design and mechanical box interactions create highly immersive and satisfying gameplay sessions
- High production value in graphics and audio sustains long-term appeal across multiple years of play
| - Visual design and atmospheric audio create a soothing, high-quality puzzle experience for players
| - The core sliding puzzle mechanic provides a relaxing and mentally stimulating experience for long-term players
| - Relaxing puzzle gameplay provides a calming mental escape for users during daily downtime
|
| Complaints | - Technical regressions in level sequencing and touch responsiveness disrupt the core gameplay flow
- Lack of developer support and broken web links prevent users from accessing help
| - Aggressive advertising frequency interrupts the flow of gameplay and frustrates active users
| - Aggressive ad frequency and intrusive ad behavior disrupt the core relaxing gameplay experience
| - | - Excessively dark visual design makes identifying critical puzzle details difficult without manual brightness adjustments
- Limited content volume leads to rapid completion and feelings of dissatisfaction regarding the price
| - Technical instability and freezing during chapter transitions disrupt the flow of gameplay
| - Excessive ad frequency between levels disrupts the flow and creates a negative user experience
| - Aggressive ad frequency and intrusive ad behavior disrupt the core relaxing experience
|
| Requests | - Accessibility features for colorblind players are needed to distinguish buttons and portals
- Expansion of the game content through a sequel or additional puzzle packs
| - Additional level content requested by long-term players who have completed all current challenges
| - Reliable cloud synchronization functionality to ensure progress is saved across multiple devices
| - | - In-game brightness and display settings to improve visibility during dark atmospheric puzzle sequences
| - Additional levels or expanded content to extend the longevity of the puzzle experience
| - Implementation of Game Center integration to track achievements and provide social competition
| - Paid subscription or one-time purchase option to remove advertisements permanently
|
| Strategic Intel |
| Strengths | - High-fidelity spatial puzzle mechanics sustain long-term replayability
- Premium, ad-free design attracts serious puzzle enthusiasts
- Established brand identity from creators of Blockwick and Orba
| - Color-blind accessibility labels expand addressable market
- 2,500+ level library creates high switching costs
- Game Center integration gamifies long-term progress
| - Tactile woody aesthetic provides premium feel
- 18,000-puzzle library sustains long-term engagement
- Established brand legacy fosters user trust
| - | - Tactile 3D mechanics establish category authority
- Editors' Choice badge sustains organic install velocity
- High-fidelity production value holds long-term appeal
| - Iconic minimalist visual language sustains long-term brand recognition
- Meditative, ad-free UX creates a high-barrier-to-entry for ad-supported competitors
- Reactive audio-visual design reinforces premium positioning
| - 3,000-level library sustains long-term engagement
- Offline-first architecture enables travel usage
- Core sliding mechanic provides reliable stress relief
| - Offline-first architecture enables session continuity in low-connectivity environments
- 60,000-puzzle library provides a massive content-moat for long-term engagement
|
| Weaknesses | - Technical regressions in touch responsiveness (latest update) erode the daily habit
- Lack of accessible support channels creates friction for stuck users
- Legacy $4.99 price point creates a conversion ceiling against free-to-play rivals
| - Ad-close button failure rate creates high friction
- Interstitial frequency exceeds user tolerance
- Lack of meta-progression layer limits session depth
| - Cloud synchronization failures prevent progress recovery
- Aggressive ad-frequency causes game freezes
- Lack of permanent ad-removal options
| - | - Premium $0.99 model lacks recurring revenue
- No in-game brightness settings for accessibility
- Limited content volume relative to competitors
| - Chapter-transition crashes in the latest release erode the user experience
- Short content duration (approx. 1 hour) limits long-term LTV
- Negative sentiment from corporate labor controversies impacts brand perception
| - No cloud-save mechanism prevents progress restoration
- Aggressive ad-frequency triggers high churn
- Technical instability on current-generation hardware
| - Aggressive ad-frequency drives high churn among long-term users
- Post-update technical regressions cause significant battery drain
|
| Pricing | paid | freemium | freemium | freemium | paid | paid | freemium | freemium |
| Momentum | Intense | Maintenance | Maintenance | - | Zombie | Maintenance | Active | Active |
| Update Cadence | 5 versions | 5 versions, 4 majors/6mo, ~313d avg | 4 versions, 2 majors/6mo, ~38d avg | - | 2 versions, ~1693d avg | 2 versions, ~298d avg | 5 versions, ~7d avg | 5 versions, ~11d avg |
