Games like Mood Swings
Games like Mood Swings include Geometry Dash, Celeste, Super Meat Boy, Hollow Knight: Silksong, and Hollow Knight. We matched them by the tags players give Mood Swings on Steam (Precision Platformer, Difficult, 2.5D, Surreal, and Indie): closest matches first, and among equally close ones the better-known games.

Geometry Dash
Shared: Difficult · Precision Platformer · Singleplayer

Celeste
Shared: Precision Platformer · Difficult · Indie

Super Meat Boy
Shared: Precision Platformer · Difficult · Indie

Hollow Knight: Silksong
Shared: Difficult · Indie · Singleplayer

Hollow Knight
Shared: Difficult · Platformer · Indie

A Dance of Fire and Ice
Shared: Difficult · Indie · Singleplayer

Jump King
Shared: Difficult · Precision Platformer · Indie

Getting Over It with Bennett Foddy
Shared: Difficult · Singleplayer · Indie

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

Golfing Over It with Alva Majo
Shared: Difficult · Precision Platformer · Indie

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

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

A Difficult Game About Climbing
Shared: Difficult · Precision Platformer · Singleplayer

VVVVVV
Shared: Precision Platformer · Indie · Difficult

Downwell
Shared: Precision Platformer · Indie · Difficult

Cuphead
Shared: Difficult · Platformer · Indie

LIMBO
Shared: Indie · Platformer · Surreal

Baba Is You
Shared: Difficult · Indie · Singleplayer

Electronic Super Joy
Shared: Difficult · Indie · Precision Platformer

Airscape - The Fall of Gravity
Shared: Difficult · Casual · 2.5D

Antichamber
Shared: Surreal · Indie · Singleplayer

Minimalism
Shared: Difficult · Indie · Casual

MIO: Memories in Orbit
Shared: Difficult · Indie · Platformer

The Witness
Shared: Difficult · Indie · Colorful