Games like Merp in Merpworld
Games like Merp in Merpworld include Rain World, Webbed, Celeste, Haiku, the Robot, and Momodora: Reverie Under The Moonlight. We matched them by the tags players give Merp in Merpworld on Steam (2D Platformer, Atmospheric, Exploration, Retro, and Cute): closest matches first, and among equally close ones the better-known games.

Rain World
Shared: Atmospheric · Exploration · 2D Platformer

Webbed
Shared: 2D Platformer · Cute · Exploration

Celeste
Shared: 2D Platformer · Pixel Graphics · Platformer

Haiku, the Robot
Shared: Exploration · Atmospheric · 2D Platformer

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

Lone Fungus
Shared: 2D Platformer · Colorful · Atmospheric

SANABI
Shared: 2D Platformer · Pixel Graphics · Retro

OneShot
Shared: Atmospheric · Cute · Pixel Graphics

Hollow Knight
Shared: Exploration · Atmospheric · Platformer

A Hat in Time
Shared: Cute · Collectathon · Exploration

Stray
Shared: Atmospheric · Exploration · Cute

Slime Rancher
Shared: Exploration · Cute · Colorful

ANIMAL WELL
Shared: Exploration · Atmospheric · Pixel Graphics

VVVVVV
Shared: 2D Platformer · Pixel Graphics · Retro

Super Meat Boy
Shared: 2D Platformer · Platformer · Pixel Graphics

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

Öoo
Shared: 2D Platformer · Exploration · Cute

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

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Platformer

Sonic Origins
Shared: 2D Platformer · Retro · Pixel Graphics

MIO: Memories in Orbit
Shared: Exploration · Atmospheric · Platformer

Narita Boy
Shared: Retro · 2D Platformer · Exploration

Sonic Mania
Shared: Retro · Colorful · Pixel Graphics

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