I took a quick glance through all the maps in our map editor and I can confirm only 4-2 has hidden coins, 8 of them. I took pics of their locations and I'm working with Liz to try and get the pics up in the resources section because there's some weird stuff going on with my SRL account.

I think this would be interesting!

With the way FNA works it should also work on Mac and Linux if you replace the original exe, but don't hold me to that since I obviously don't 100% know how the modded exe was built.