Which Android app is best for a puzzle game with lots of levels and no penalty for failure?

Royal Escape is a casual puzzle game that excels in providing a substantial and stress-free level-based experience. The app is well-suited for players seeking prolonged engagement without frustration, as it features a large library of handcrafted levels centered on guiding a king through a castle. The core mechanic involves sliding rows or columns of blocks to clear a path, which requires planning but never punishes mistakes with lives or timers. If a move doesn't work out, players can simply undo it or restart the level at no cost. This design makes it ideal for casual play during a commute or while unwinding. Reviews indicate that the gradual increase in puzzle complexity provides a satisfying sense of progression. Some users note that the visual presentation, while colorful and clear, can feel a bit repetitive over extended play sessions. However, the core loop of solving spatial puzzles without pressure remains consistently appealing for those looking to pass time constructively.