Games like Squirm
Games like Squirm include Celeste, Jump King, Super Meat Boy, Hollow Knight: Silksong, and Hollow Knight. We matched them by the tags players give Squirm on Steam (Indie, Adventure, Precision Platformer, 2D, and Difficult): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Indie · Difficult

Jump King
Shared: Indie · Precision Platformer · Difficult

Super Meat Boy
Shared: Precision Platformer · Indie · Difficult

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

Hollow Knight
Shared: Indie · Difficult · Platformer

Geometry Dash
Shared: Difficult · 2D · Precision Platformer

Rain World
Shared: Indie · Difficult · Pixel Graphics

VVVVVV
Shared: Precision Platformer · Indie · Pixel Graphics

The End Is Nigh
Shared: Indie · Precision Platformer · Adventure

Shovel Knight: Treasure Trove
Shared: Indie · Pixel Graphics · Platformer

SANABI
Shared: Pixel Graphics · Adventure · Indie

Downwell
Shared: Precision Platformer · Indie · Pixel Graphics

Skul: The Hero Slayer
Shared: Indie · 2D · Pixel Graphics

Out There Somewhere
Shared: Indie · Adventure · Pixel Graphics

Blasphemous
Shared: Pixel Graphics · Indie · 2D

Noita
Shared: Indie · Difficult · Pixel Graphics

Reventure
Shared: Indie · Adventure · Pixel Graphics

Terraria
Shared: 2D · Adventure · Pixel Graphics

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

The Binding of Isaac: Rebirth
Shared: Indie · Difficult · Pixel Graphics

Squishy the Suicidal Pig
Shared: Indie · Adventure · Platformer

Hyper Light Drifter
Shared: Indie · Adventure · Pixel Graphics

LIMBO
Shared: Indie · Adventure · 2D

Nine Sols
Shared: 2D · Difficult · Indie