Games like Slime Climb
Games like Slime Climb include Celeste, Super Meat Boy, Geometry Dash, SANABI, and Jump King. We matched them by the tags players give Slime Climb on Steam (Precision Platformer, Platformer, Difficult, 2D Platformer, and Side Scroller): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · Platformer

Super Meat Boy
Shared: Precision Platformer · Platformer · Difficult

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

SANABI
Shared: 2D Platformer · Action · Platformer

Jump King
Shared: Precision Platformer · Difficult · Platformer

VVVVVV
Shared: Precision Platformer · Platformer · 2D Platformer

Hollow Knight
Shared: Platformer · Difficult · 2D

Downwell
Shared: Precision Platformer · Platformer · 2D Platformer

Blasphemous 2
Shared: Difficult · 2D Platformer · Side Scroller

Thomas Was Alone
Shared: Platformer · Precision Platformer · Side Scroller

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Side Scroller · Difficult

Super Meat Boy Forever
Shared: Difficult · Precision Platformer · Platformer

Shovel Knight: Treasure Trove
Shared: Platformer · Difficult · Side Scroller

The End Is Nigh
Shared: Precision Platformer · Platformer · Difficult

Rain World
Shared: Difficult · Platformer · 2D Platformer

Katana ZERO
Shared: Platformer · 2D Platformer · Action

Skul: The Hero Slayer
Shared: Platformer · Action · Difficult

Bread & Fred
Shared: Precision Platformer · 2D Platformer · Difficult

I wanna be the Creator
Shared: Platformer · Precision Platformer · Difficult

Ambidextro
Shared: Precision Platformer · 2D Platformer · Platformer

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

N++ (NPLUSPLUS)
Shared: Precision Platformer · Difficult · 2D Platformer

Pogostuck: Rage With Your Friends
Shared: Precision Platformer · Difficult · Platformer

Spelunky 2
Shared: Platformer · Difficult · 2D Platformer