World 1-5 (Super Mario Bros. 3)

World 1-5 is the sixth level of Grass Land in Super Mario Bros. 3 and the sixth level in the game overall. The level takes place in the underground tunnels with pools of water.

Layout
The level begins with Mario/Luigi sliding down a slope that leads into a cave. The player then slides into and kills (unless they jump before hitting them) 4 Buzzy Beetles. The slope then drops the player into a small pool of water with 5 coins over it. Immediately after this is an upward slope which leads to two Piranha Plants and a Buzzy Beetle. There are then two different paths; A top path, and a bottom path, both of which lead out of the cave and up to the surface of the cave, where there are 3 large slopes and multiple Green Koopa Troopas. The top path is rather short, quickly leading out of the underground section. However, it also has a hidden Pink Note Block in it that takes the player to Coin Heaven. The bottom path is much longer than the top path, having a large pool of water with 5 more coins in it followed by two small pockets of water and a smaller pool of water containing a ? Block with a Mushroom/Fire Flower inside it, before also leading up to the surface (a bit farther down than the top path). After going forward some more, there is another tunnel that leads to a small area with multiple pipes, two of which have a Piranha Plant and a Venus Fire Trap, respectively. The last pipe is a Warp Pipe that leads to the end of the level.

Enemies

 * Buzzy Beetle
 * Piranha Plant
 * Venus Fire Trap
 * Koopa Troopa