Games like Mushroom Hunter
Games like Mushroom Hunter include Celeste, Super Meat Boy, Webbed, SANABI, and OneShot. We matched them by the tags players give Mushroom Hunter on Steam (Side Scroller, Precision Platformer, 2D Platformer, Collectathon, and Puzzle): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · 2D Platformer · Indie

Super Meat Boy
Shared: Precision Platformer · 2D Platformer · Indie

Webbed
Shared: 2D Platformer · Cute · Puzzle

SANABI
Shared: 2D Platformer · Adventure · Side Scroller

OneShot
Shared: Cute · Puzzle · Indie

VVVVVV
Shared: Precision Platformer · 2D Platformer · Pixel Graphics

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

Helltaker
Shared: Puzzle · Cute · Singleplayer

The Last Campfire
Shared: Puzzle · Cute · Adventure

Thomas Was Alone
Shared: Side Scroller · 2D Platformer · Precision Platformer

Downwell
Shared: Precision Platformer · 2D Platformer · Indie

Planet of Lana
Shared: 2D Platformer · Puzzle · Singleplayer

LIMBO
Shared: Puzzle · Side Scroller · Indie

Prince of Persia The Lost Crown
Shared: 2D Platformer · Side Scroller · Precision Platformer

Changed
Shared: Cute · Puzzle · Singleplayer

Baba Is You
Shared: Puzzle · Cute · Singleplayer

The Warrior
Shared: Precision Platformer · Side Scroller · Cute

A Hat in Time
Shared: Collectathon · Cute · Adventure

Bzzzt
Shared: Precision Platformer · 2D Platformer · Score Attack

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

Geometry Dash
Shared: Precision Platformer · Side Scroller · Singleplayer

Öoo
Shared: 2D Platformer · Puzzle · Cute

Bō: Path of the Teal Lotus
Shared: Side Scroller · Precision Platformer · 2D Platformer

The Pedestrian
Shared: Side Scroller · Puzzle · 2D Platformer