In patreon build is chapter 4, you can defeat Aquilo (the eagle) and i guess at this moment, the main story is 35-40% done.So like how far is the main story? Last thing I remember was taking the polar bear to the church and the fox battle.
In the future builds and chapters, at the coliseum i guess we'll defeat the panther, the lion, and i think the last one is the rabbit king...aaand that's all, but i don't know really, it's just my thoughts.
BUT! This game also contains side events, locations (like wide forest or cave) and many quests that is a part of the main story, and the locations often have their own bosses too. And the new quests, events and locations also appear each new chapter, so the number may be 20-25% or even smaller, so...
Time will tell.
Bruh, i don't know why i wrote this, sorry.