Games like Marshmallow Marvin: Templestone
Games like Marshmallow Marvin: Templestone include Celeste, Downwell, SANABI, Sonic Origins, and Webbed. We matched them by the tags players give Marshmallow Marvin: Templestone 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