There are three hidden caverns in the world you can find. One you will need the shrink ability to get to. I didn't make any indicators for them so I'll release a new version so people can find them easier. Thank you!
Ah yeah, I think I found those, two big caverns where you can drop into, one big cavern you need to shrink for and two smaller hidden caverns, correct? But there's no ending after defeating the three bosses? It's just done?
