Games like The Merlies
Games like The Merlies include Webbed, Hollow Knight, Rain World, Neva, and Ori and the Will of the Wisps. We matched them by the tags players give The Merlies on Steam (Exploration, 2D Platformer, Cute, Nature, and Adventure): closest matches first, and among equally close ones the better-known games.

Webbed
Shared: 2D Platformer · Cute · Exploration

Hollow Knight
Shared: Platformer · Exploration · 2D

Rain World
Shared: Exploration · Platformer · 2D Platformer

Neva
Shared: Adventure · Platformer · 2D Platformer

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

Slime Rancher
Shared: Exploration · Cute · Adventure

Hoa
Shared: 2D Platformer · Cute · Exploration

A Short Hike
Shared: Exploration · Cute · Adventure

Carto
Shared: Cute · Exploration · Adventure

Hollow Knight: Silksong
Shared: Exploration · Platformer · 2D

Jusant
Shared: Exploration · Adventure · Nature

Stray
Shared: Adventure · Exploration · Cute

Thank Goodness You're Here!
Shared: Exploration · Adventure · 2D Platformer

Celeste
Shared: 2D Platformer · Platformer · Cute

GRIS
Shared: Adventure · Platformer · Atmospheric

Öoo
Shared: 2D Platformer · Exploration · Cute

My Little Puppy
Shared: Adventure · Cute · Exploration

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

MIO: Memories in Orbit
Shared: Exploration · Platformer · 2D

ANIMAL WELL
Shared: Exploration · Platformer · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Cartoony

Terraria
Shared: Adventure · Exploration · 2D

Slime Rancher 2
Shared: Cute · Relaxing · Adventure

The Darkest Tales — Into the Nightmare
Shared: 2D Platformer · Adventure · Exploration