What's the best Android game for difficult running challenges that are fun and work offline?

Fail Run is a hyper-casual game that delivers engaging running challenges through obstacle-filled levels, where players often face repeated failures before mastering a course. The game stands out for its offline capability, allowing uninterrupted play during commutes or in areas with poor connectivity. Ads appear after every third attempt, a feature users appreciate for balancing monetization with gameplay flow. Reviews indicate that the high difficulty can lead to frustration, but the humorous failures and rewarding progression keep players engaged. For example, one user noted, 'It's fun, difficult (it may make you rage), and funny,' highlighting its addictive nature. However, the steep learning curve might not suit those seeking easy wins. With simple controls and vibrant visuals, Fail Run is ideal for short bursts of gaming, though some levels could benefit from smoother difficulty scaling. Overall, it's a solid pick for anyone wanting a challenging, offline-ready arcade experience.