I'm very sorry to have kept you waiting for so long. I'm also sorry that my computer couldn't upload the pictures .I meant, those of the beetles. Their collision determination is rather strange. But it's okay, after all, I'm not very good at video games.
I was having a lot of trouble at first but try holding the key/button to jump! If you aren't continually pressing the jump button she will only do a little bounce off the first one she comes in contact with and that's all. Some of the platforms require you to keep bouncing on them as they move, too, so hold jump and it'll work