World 7-3 (Super Mario Bros.)

World 7-3 is the third level of World 7 in Super Mario Bros.

Layout
World 7-3's layout is similar to World 2-3's, but with added Koopa Troopas and Koopa Paratroopas that are placed on the various bridges, along with additional Cheep Cheeps. The level is made up of long bridges the player must run and jump across while avoiding an endless array of jumping Cheep Cheeps. If the player is running, the Cheep Cheeps will usually jump up behind the player, though if the player is walking, they will jump from the front and there is a good chance of the player getting hit. The player also needs to jump across some small floating platforms that are placed in the second half of the stage. In the only ? Block near the center of the level is a power-up. If the player reaches the stone steps at the end, the Cheep Cheeps will stop jumping from below.

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 directly above the second support column of the first bridge, and the score to beat is 28000. The Red Coin locations are:
 * High above the stone stairs at the start of the level
 * High above the center of the third bridge, a new Hidden Block can be found directly underneath
 * Red Coins 3 and 4 are located between the floating platforms, with the third Red Coin placed above the first platform and the fourth Red Coin placed low between the second and third platforms
 * Placed high above the final grass platform before the stone stairs to the goal

Enemies

 * Cheep Cheeps
 * Koopa Troopas
 * Koopa Paratroopas

Level statistics

 * Power-ups: 1 (Super Mushroom or Fire Flower)
 * 1-Up Mushrooms: 0
 * Secret areas: 0
 * Coins needed to collect in order to enable hidden 1-Up in 8-1: 35

Mondo 7-3 (Super Mario Bros.)