I saw another comment talking about a difficulty setting, and I immediately went back to the game to try the hardest difficulty. Guess what, I couldn't beat it XD
I don't know what it changed but I believe it changed the maze? If not, then I just got lucky in the first attempt XD
Fun fact: Even without reading a thing I managed to understand that if your "metamorphosis bar" goes too low enemies can catch you (after some failed attempts of course)