Games like Peanut
Games like Peanut include Hollow Knight, Pikuniku, BEEP, Hollow Knight: Silksong, and Chained Together. We matched them by the tags players give Peanut on Steam (Casual, Indie, Adventure, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Indie · 2D

Pikuniku
Shared: Indie · Casual · Adventure

BEEP
Shared: Indie · Adventure · Platformer

Hollow Knight: Silksong
Shared: Indie · 2D · Platformer

Chained Together
Shared: Adventure · Casual · Platformer

LIMBO
Shared: Indie · Platformer · Adventure

FEZ
Shared: Indie · Platformer · Casual

Nihilumbra
Shared: Indie · Adventure · Casual

GRIS
Shared: Indie · Adventure · Platformer

Minimalism
Shared: Casual · Indie · Platformer

Super Fancy Pants Adventure
Shared: Indie · Adventure · Casual

Thank Goodness You're Here!
Shared: Adventure · Casual · Indie

Melvor Idle
Shared: Casual · Indie · Adventure

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Casual

Running Through Russia
Shared: Casual · Indie · Adventure

Florence
Shared: Casual · Indie · Adventure

Pinstripe
Shared: Indie · Casual · Adventure

No Time To Explain Remastered
Shared: Indie · Casual · Adventure

Dust: An Elysian Tail
Shared: Indie · Platformer · Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Adventure

Reventure
Shared: Indie · Adventure · 2D

Squishy the Suicidal Pig
Shared: Indie · Platformer · Adventure

BADLAND: Game of the Year Edition
Shared: Indie · Adventure · 2D

Mark of the Ninja
Shared: Indie · Platformer · 2D