Super Mario Bros World 2-1

The level is set above ground, sky and underground. The clock starts at 400 seconds. There are 24 enemies placed on the map: 16 Goombas and 8 Koopa Troopas. There are 57 coins lying in the open or hidden in blocks. Power-ups: 4 Super Mushrooms, 1 Starman and a 1-Up Mushroom.

Hidden vine. One brick in this level hides a vine. Hit it from below and climb to a bonus area above the clouds.

Pipes you can enter. One of the pipes can be entered by pressing down on top of it. The other 7 are decoration or obstacles.

Every number above is read straight out of the game files this site runs on, so the map you play here is the map being described.