Man how did they do that. I've been grinding for a while now and I haven't made it, but I figure I know a bit about the game now to mention some things. As a minor nitpick, I don't know about you, but I think if you have two shoes on the banana peel, shouldn't they both jump 2 spaces? This can sometimes happen if you have both shoes hop together straight onto a banana so it happens very rarely. It did kill me though... Oh also I figured out that you can hold down a crumbly tile and have the other shoe walk over the crumbly tile to get both across, that's a pretty cool trick!
There are some cases where that happens, yes, but It is intentional and i made the levels with that in mind, so that players try to avoid having one shoe on top of the other in some cases, and try to have them togheter in others
And yeah! You're the only one that found that trick. it allows to go through lots of the key rooms wayyy faster