Then there's the whole thing with the stars. I don't know how people discovered this. I have a list of the levels they appear on, and I've made it to one, but wasn't able to actually get it. The unfortunate thing is that if you've already completed the puzzle for World 3, you have to start your game over to get one of the stars. So I'm contemplating if I should start over before trying to get any stars.
Care to share that list? All I can find on google are links to the videos, and I'd hate to spoil them any more than I have to. A little nudge toward where they are would be useful, since I went through the whole game without a clue they existed.
The eight locations are:
Overworld, 2-2, 4-5, 4-7, 5-4, 6-5, 6-6, 1-1
Most likely, that won't be enough to get some of them. There are some jumps where you have to be so exact that it's extremely difficult without a walkthrough. I don't even know how people discovered them on their own. I still haven't gotten the one in 1-1. I know what I need to do, I'm just not totally sure how to go about it. I give it a try every once in a while.