-Spoilers- I finally found a way to it. Spoiler Once you get to the very top box, the one you need to push over the ledge onto the button, push it to the very left instead. Then jump from the top of it into the left wall. You can see an indent in the vines and stuff. It's a hidden tunnel type thing, not something that had previously shown up in the levels. Hope that helps!
Please do spoiler clear game hints, so people can decide on their own whether they want to be spoilered or not ...
Marda (World 1) crowns are in levels Spoiler 1, 3, 5, 6, 7, 9, 10, 14 Grasi (World 2) crowns are in levels Spoiler 2, 5, 7, 9, 11, 13 Winda (World 3) crowns are in levels Spoiler 3, 4, 5, 6, 8, 11 edit: forgot one crown in Marda, thank you Analander for pointing that out
Just go faster! You just have to get to the bottom faster than the crate. Assuming you've worked that out: Hint 1: Spoiler Don't press the yellow at the button. Go past it. Hint 2: Spoiler Fall fast. Don't glide slowly down the big drops. Hint 3: Spoiler You can save a lot of time if you jump and glide from the highest point on the left in the left-to-right section.
Thanks so much! That did it! You know, if I had to sum this game up, it's like a (SO FAR!) doable Super Meat Boy. Tough but fair, and lots of fun.
I am missing only one crown in World 2 :/ Does anyone now where I can find it? I have found the crown in 5,7,9,11,13. Strangely I have unlocked all the crown achievements; wondering if there's a bug(?) EDIT: thank you rhinofinger!