In the PimoLems level "Candelabrum", I can't seem to play the level because I am missing the CaveLem style. Anywhere I can download it?
Hi and welcome to the forums! :)
If you have the NL online features enabled inside the option menu you can download missing styles over the "Style Manager" in there.
It should even give you the option to download it on the fly if you encounter a missing one in this case.
All styles from the standard library can be added this way.
Otherwise https://www.neolemmix.com/?page=neolemmix has the complete style collection linked as well and just extract it inside you NL folder.
Hope this helps. :)