Another offer that is pretty infuriating. Based on luck of what pieces you have. 1-30 fine. 40-50 near impossible unless you're lucky and get good pieces. And I've heard 60 is pretty
Flow Rainbow Pack Level 60 • Game Solver
Line Puzzle: Pipe Art 22.0118.00 - Android用ダウンロードAPK無料
Find A Way: Level 51 to Level 60 | HelpMeWithGames