[edraferi]

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

[jsgo]

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.