World 7-1 (Super Mario Bros.)

World 7-1 is the first level of World 7 in Super Mario Bros. In Super Mario Bros. and Super Mario Bros. Deluxe, the level has a simple grassland pallet, but in Super Mario All-Stars, the ground is covered in snow, though does not affect the player's movement.

Layout
World 7-1 is lined with Bill Blasters and pipes with Piranha Plants. In the left block of the row of Brick Blocks above the second Bill Blaster is a power-up, and the block directly right of the floating Bill Blaster is a Coin Block. Across the gap and after the first pipe are two Hammer Bros. that jump between two rows of Brick Blocks. Above the left of the next pipe is a Hidden Block with a 1-Up Mushroom, and said pipe leads to an underground chamber with Coins, which exits out of the second pipe to the right. After another duo of Hammer Bros. is a springboard that can help the player reach a high block with a power-up, followed by two flights of stone stairs with a Buzzy Beetle walking down the second one before the Goal Pole.

Super Mario Bros. Deluxe challenges
In Super Mario Bros. Deluxe, the player can collect five Red Coins, find a hidden Yoshi Egg, and get a medal based on their score. The Yoshi Egg is found in a Hidden Block between the two staircases at the end, and the score to beat is 32000. The Red Coin locations are:
 * In second from the right ? Block after the first power-up
 * In a new Coin Block in the middle of the bottom row of Brick Blocks during the first set of Hammer Bros.
 * In the underground area, above the exit pipe. A new Hidden Block can be found above the pipe to reach the Red Coin
 * In a new Coin Block in the middle of the top row of Brick Blocks during the second set of Hammer Bros.
 * In one of the Brick Blocks after the springboard

Enemies

 * Bill Blasters
 * Bullet Bills
 * Koopa Paratroopas
 * Piranha Plants
 * Hammer Bros.
 * Koopa Troopa
 * Buzzy Beetle

Level statistics

 * Power-ups: 2 (Super Mushrooms or Fire Flowers)
 * 1-Up Mushrooms: 1
 * Secret areas: 1

Trivia

 * Hamma Jamma mentions "World 7-1" as his grandfather's "'hood" in Paper Mario: The Thousand-Year Door, indicating that he grew up as one of the level's four Hammer Bros.