The simple nature of trying to get 100%.
Some games give you hints on where stuff is (Metroid Prime 3 & 4). Some games do not. With all the Mario games, I’m going to do my level best to get 100%, though I’ll put more emphasis on it with games that lock out levels for it. Every Yoshi game does this, along with most of the platformer Mario games. For those, I’ll look things up if I absolutely can’t find something, but I’ll give it a few tries. Still, this game seems to ramp up that difficulty faster than most.
Another factor in the difficulty is probably that I last played it so long ago that I really don’t remember it. Aside from the replay of a tiny bit of world 1 five years ago, I think it’s been over half my life since I last picked it up. When I’m playing as Luke, I’m trying to play as if it’s my first time, as well as never look anything up. However, that’s such a long span that it may as well be my first time. I’m still trying not to look things up, but I only have a two-hour stream on Sundays and want to make at least some progress.
As with any game, it gets harder as you go. This game gives such a deluge of extra lives that I have no reason to expect a Game Over, but I certainly expect progress to slow. I think four levels per stream is probably the lowest it’ll go, but that’s still pretty slow. When I started up the Mario series for Sundays, I knew it would likely be years to get through it all. That’s why I’m doing polls: I want to play what people want to watch, not just do everything in release order. The reason each set is in release order is partly to make the poll smaller and partly because many of these games reference each other.