Games like Mariusz: the game
Games like Mariusz: the game include Celeste, Webbed, Super Meat Boy, Braid, and Geometry Dash. We matched them by the tags players give Mariusz: the game on Steam (Runner, 2D Platformer, Puzzle Platformer, Difficult, and Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Difficult · 2D Platformer · Platformer

Webbed
Shared: 2D Platformer · Puzzle Platformer · Platformer

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

Braid
Shared: Puzzle Platformer · 2D Platformer · Platformer

Geometry Dash
Shared: Difficult · 2D · Platformer

Getting Over It with Bennett Foddy
Shared: Difficult · Psychological Horror · Platformer

Rain World
Shared: Difficult · Platformer · 2D

Downwell
Shared: 2D Platformer · Platformer · Arcade

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

LIMBO
Shared: Puzzle Platformer · Platformer · 2D

Hollow Knight
Shared: Platformer · Difficult · 2D

Squishy the Suicidal Pig
Shared: Puzzle Platformer · Platformer · Difficult

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · 2D

SANABI
Shared: 2D Platformer · Pixel Graphics · 2D

Jump King
Shared: Difficult · Psychological Horror · Platformer

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

Laughing to Die
Shared: 2D Platformer · Platformer · Casual

Katana ZERO
Shared: 2D Platformer · Platformer · Pixel Graphics

FEZ
Shared: Platformer · Puzzle Platformer · Pixel Graphics

VVVVVV
Shared: 2D Platformer · Platformer · Difficult

Blasphemous 2
Shared: Difficult · 2D Platformer · Platformer

Turbo Pug
Shared: Runner · Difficult · 2D

Shovel Knight: Treasure Trove
Shared: Platformer · 2D · Difficult

Rogue Legacy 2
Shared: Arcade · Platformer · Difficult