for the first jump in the weird platforming section in 4-2, you can skip at least 1 coin. for the last coin in that section, i'm pretty sure it is mandatory. 1 coin is required for the big jump. yes, you can skip the big jump while grabbing only 1 coin. it is extremely precise. i think 1 coin is required for the koopa section, since you can use a book/big item to damage boost through some of the last koopas. the final jump off the red one is possible to be done without grabbing the coin. the thin block with the one coin on top is impossible to do without getting the coin, i think. and for the ice bill section, you can grab 1 coin for every time there's two coins right beside each other (i think?) and you can skip the coins floating in midair that tell you where to jump. the final tally: 6/7. not exactly sure.
- proof of 1 coin big jump - proof of red koopa bounce with no coin needed
idk if this is exactly right
i think both level runs and world runs would be good so that way we can have more categories to run instead of only any% and all coins