The level is broken up into four main areas. The first is the entrance area, which is a small, rocky hill with a lone Sir Kibble. The next area is the one most like the level's title: a long, flat plain. There are few distinguishing features, save for a few small ponds. Next is a small tunnel system with many Bomb Blocks. The last area is the most mountainous part of the four, which features the level's mid-boss, Chef Kawasaki. The room after Kawasaki has the exit door, and two Waddle Dees and two Sir Kibbles on small platforms, most likely included there to show off the power of the Cook ability given by Kawasaki.
In the remake, there is a glitch that can only be performed if Kirby has the Suplex ability. Kirby should navigate to the drop with a Bomber, then leap and grab it. After Kirby does that, the player should press A/Y right before Kirby lands on the floor. Kirby will jump and the game will freeze.
- The first room that Kirby starts in may be a reference to the first room in the international release of Super Mario Bros. 2. Kirby starts out in the air and descends a series of steep hills until entering a door at the very bottom, much like in Super Mario Bros. 2. This has not been confirmed by HAL Laboratory, and is mere speculation.
- The music for Peanut Plains was remixed in Kirby: Triple Deluxe as the music for Stage 4 of Old Odyssey.
- In Kirby Star Allies, when playing the Guest Star ???? Star Allies Go! sub-game as Marx, some stage layout in Level 3 is changed to reflect Peanut Plains from Kirby Super Star.