You've reached places you shouldn't.
Jump 200 times.
Jump 500 times.
Jump 1000 times.
Die 50 times.
Die 100 times.
Die 200 times.
Stick to mosses 50 times.
Break 50 bricks.
Get hurt by spikes 50 times.
Get hurt by dark ghosts 50 times.
Get hurt by saws 50 times.
Slide quickly for a total of 60 seconds
Slide slowly for a total of 60 seconds.
Lose 7 lives (assist mode)
Lose 9 lives (assist mode)
Lose 99 lives (assist mode)
Finish the game
Finish the game in less than 40 minutes
Lose the maximun lives from the assist mode in a single stage
Go through any stage without touching the ground more than once
Jump perfectly in a specific mushroom.