what're some other interesting "incremental games" out there these days? for me at least, just seeing numbers go up and get huge (Swarm Simulator) doesn't really do it for me. part of what makes Universal Paperclips so good is that, like Candy Box, a huge part of the joy is uncovering entirely new gameplay systems as you progress. A Dark Room was neat in that it brought the idea of a coherent narrative that you (some…
SPACEPLAN is certified classic: http://jhollands.co.uk/spaceplan/ (free prototype to play in browser with paid full version on Steam/iOS/Android).
Spaceplan is a relatively short and simple experience (there's not much to optimize, just do), but it's so well done that I highly recommend it.