Anti-Idle: The Game a game originally created in 2009 and the original .swf file has been updated until 2020-21ish then after with a small community cresting bug fixes created enough drive to have begun beta testing and a small discord server for feedback for a port to moblie, the reason I'm posting this is because it has finally begun beta testing for mobile port after it's 15 year anniversary iirc.
(Taken from Kongregate.com the original host of the game)
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Meaning this game has technically speaking been in development for over 10+ years and I personally have invested about over 100 hours already into it on pc and it's moblie port will easily add over 1000 hours for me.