It reminds me of paperclips too. I opened it just to check it out. It was so simple that every few clicks I could discover a new few-clicks, and the next thing I know I've been clicking away for a couple of hours.

I’m not familiar with that. Reading about it now cheers. Looks like a “cookie clicker”

The genius of Universal Paperclips [0] is that it teaches you the unintuitive ways that exponential systems work. Things seem to move very slowly, then they explode very very quickly. (Assuming that’s the paper clip game mentioned by GP!)

[0] https://en.wikipedia.org/wiki/Universal_Paperclips

Personally, I enjoy Crusaders of the Lost Idols and have recently taken up Idle Champions of the Forgotten Realms.

A more straight up click based one w/o much of a graphical component would probably be AdVenture Capitalist or the like.