People are really calling this a "great" guide? I've already given up on the guide after missing gem #5. I got the strawberry and moved on but there was no baby gate with a gem. I think I might have had to backtrack but the guide didn't mention that at all lol. I really don't get how a guide can be so poorly written for a game like this with no backtracking allowed and no chapter select and no multiple save filed or manual saving. As soon as you miss a gem, that's that you can't get it again and that's more pointless white gem grinding that I should have to do. Ugh.
I'd really love to know why the description for gem #5 doesn't mention you need to backtrack. Just wow.