For anyone who is a fan of idle games, I highly commend Cell: Idle Factory Incremental (CIFI). There's a lot of content to unlock and it always feels like you're making progress toward something.
Just like work! I'm never quite convinced I am, though.
As a big fan of the genre I do NOT recommend cifi. It has nice polish and a neat general design, but also has strong incentives for leaving the game open and your screen on (for engagement farming) and a whole lot of purchasable (real money) upgrades. and I do mean a lot.
I think those things are true. I did buy a couple inexpensive upgrades myself, but it's possible to make progress without them.