Honestly this is not worth playing it to the end. While the music is sometimes beautiful and the art really impressive and creative for its time, this game is a pain to play and move forward. Some nonsense has to be done, going back and forth at the other side of the worlds to do certain tasks or remember specific things you would never expected to be useful. So you will struggle and see several (simplistic) guides on the internet to try to figure this out. Moreover, some areas in those worlds can be sooo unclear to move around (forest in Yucatan or the final underwater stage)... I think it is not worth the time and patience do complete it, as the story itself can be resumed at the typical "light VS dark battle", try it if you want but beware of its flaws.