Games like Marshmallow Marvin
Games like Marshmallow Marvin include Celeste, Downwell, SANABI, Sonic Origins, and Webbed. We matched them by the tags players give Marshmallow Marvin on Steam (Action, Adventure, Casual, Arcade, and Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

Downwell
Shared: Action · Precision Platformer · Platformer

SANABI
Shared: Action · Adventure · 2D Platformer

Sonic Origins
Shared: Action · Adventure · 2D Platformer

Webbed
Shared: 2D Platformer · Exploration · Platformer

Rogue Legacy 2
Shared: Action · Arcade · Platformer

VVVVVV
Shared: Platformer · Precision Platformer · 2D Platformer

Planet of Lana
Shared: Action · 2D Platformer · Adventure

FEZ
Shared: Platformer · Adventure · Exploration

Hollow Knight
Shared: Platformer · Adventure · Exploration

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

Sonic Superstars
Shared: Action · Adventure · Platformer

Leap Year
Shared: Exploration · 2D Platformer · Precision Platformer

Thank Goodness You're Here!
Shared: Adventure · Casual · Exploration

Ori and the Will of the Wisps
Shared: Action · Platformer · Adventure

DAVE THE DIVER
Shared: Casual · Adventure · Exploration

Katana ZERO
Shared: Action · Platformer · 2D Platformer

UFO 50
Shared: Action · Arcade · Adventure

Dust: An Elysian Tail
Shared: Action · Platformer · Adventure

ANIMAL WELL
Shared: Exploration · Platformer · Adventure

Chained Together
Shared: Adventure · Casual · Platformer

Broforce
Shared: Action · Platformer · 2D

Exit the Gungeon
Shared: Action · Arcade · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Action