Donut Secret 1

Donut Secret 1 is the first underwater level in the game Super Mario World. This level is a secret level, accessable when the Mario Bros. find the Key and the Keyhole of Donut Plains 1. Donut Secret 1 also has a secret exit. The regular exit leads to the Donut Ghost House, while the secret exit leads to the Donut Secret House.

Overview
This underwater level consists of one long underwater screen and an above ground room. The player has 300 seconds on the Timer to complete the level.

The underwater screen has many Rip Van Fish, Cheep Cheeps, and Blurps, while the above ground room has Koopa Paratroopas. To get into the above ground room, the player should enter the first blue Pipe. There are ? Blocks in the above ground room which contain P-Balloons. The player must use these to float up, and if either top corners of the room are reached, the player will find a Dragon Coin. The Giant Gate can be found on the right edge of the screen, a little ways past the keyhole

Secret Exit
The secret exit can be difficult to find, as the key requires strategic use of the P-Switch. To find the key, the player should carry the P-switch to the row of Used Blocks, and then stomp on it. This will change some Used Blocks into Coins, and one Used Block into a ? Block. Before the P-switch time runs out, the player will need to collect some of the coins and hit the ? block for the key to pop out. The keyhole is just right of the key.