Games like Mighty Fling
Games like Mighty Fling include Jump King, Celeste, Getting Over It with Bennett Foddy, A Difficult Game About Climbing, and Super Meat Boy. We matched them by the tags players give Mighty Fling on Steam (Precision Platformer, Difficult, Action, Adventure, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

Jump King
Shared: Difficult · Precision Platformer · Psychological Horror

Celeste
Shared: Precision Platformer · Difficult · Pixel Graphics

Getting Over It with Bennett Foddy
Shared: Difficult · Psychological Horror · Indie

A Difficult Game About Climbing
Shared: Difficult · Adventure · Psychological Horror

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

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

Hollow Knight
Shared: Difficult · Platformer · Indie

SANABI
Shared: Action · Pixel Graphics · Adventure

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

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

Hollow Knight: Silksong
Shared: Difficult · Indie · Adventure

Skul: The Hero Slayer
Shared: Action · Indie · Pixel Graphics

Rain World
Shared: Difficult · Pixel Graphics · Indie

VVVVVV
Shared: Precision Platformer · Pixel Graphics · Difficult

Downwell
Shared: Precision Platformer · Pixel Graphics · Action

Hyper Light Drifter
Shared: Difficult · Pixel Graphics · Adventure

I wanna be the Creator
Shared: Action · Adventure · Difficult

Noita
Shared: Difficult · Pixel Graphics · Indie

Peaks of Yore
Shared: Difficult · Adventure · Psychological Horror

Blasphemous
Shared: Pixel Graphics · Difficult · Action

Dead Cells
Shared: Adventure · Pixel Graphics · 2D

Nine Sols
Shared: Difficult · Action · Platformer

Titan Souls
Shared: Difficult · Adventure · Action