Room always changes, its a 1/3 chance the path is unlocked. If the exit on the current room is the top middle one, that means you where on the correct one and missed it.
hey another thing how can you get the final evolution, is it near the end of the game because i cant find the core that's needed anywhere
also it saids to investigate the old ruins after talking with your sister about the artifact and getting a neckless from her is that the end of the itch.io version do i have to get it off patron to go farther in the game