World 2-3 (Super Mario Bros.)

World 2-3 is the third level of World 2 in Super Mario Bros.

Layout
World 2-3 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's a good chance of the player getting hit. The player also needs to jump across some small platforms that are placed in the second half of the stage. In the only ? Block 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 in the center of the second grass platform, and the score to beat is 23000. The Red Coin locations are:
 * Over the second bridge with the other coins
 * Just before the grass platform in the middle of the level, over the gap
 * On the edge of the low platform
 * Above the center small platform
 * On the ground next to the Goal Pole

Enemies

 * Cheep Cheeps

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 3-1: 35

Mondo 2-3 (Super Mario Bros.)