Games like So it's Simple!
Games like So it's Simple! include Hollow Knight, Ori and the Will of the Wisps, Neva, Webbed, and Rain World. We matched them by the tags players give So it's Simple! on Steam (Adventure, Arcade, Interactive Fiction, Platformer, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Adventure · 2D

Ori and the Will of the Wisps
Shared: Platformer · Adventure · Exploration

Neva
Shared: Adventure · Platformer · Atmospheric

Webbed
Shared: 2D Platformer · Exploration · Platformer

Rain World
Shared: Exploration · Platformer · Adventure

Slime Rancher
Shared: Adventure · Exploration · Cute

GRIS
Shared: Adventure · Platformer · Atmospheric

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

Finding Paradise
Shared: Adventure · 2D · Interactive Fiction

My Little Puppy
Shared: Adventure · Exploration · Colorful

Celeste
Shared: Platformer · 2D Platformer · Adventure

Laika: Aged Through Blood
Shared: Arcade · 2D Platformer · Platformer

Islets
Shared: Adventure · Platformer · Atmospheric

Stray
Shared: Adventure · Exploration · Atmospheric

Jusant
Shared: Adventure · Exploration · Atmospheric

Night in the Woods
Shared: Adventure · Exploration · Atmospheric

The Darkest Tales — Into the Nightmare
Shared: Adventure · Platformer · 2D Platformer

SANABI
Shared: Adventure · 2D Platformer · Platformer

When The Past Was Around
Shared: Hidden Object · Interactive Fiction · Cute

The Elephant Collection
Shared: Adventure · Arcade · Platformer

Carto
Shared: Adventure · Exploration · Cute

Thank Goodness You're Here!
Shared: Adventure · Exploration · 2D Platformer

Rogue Legacy 2
Shared: Arcade · Platformer · Adventure

MIO: Memories in Orbit
Shared: Platformer · Exploration · Atmospheric