Games like CardyHeim
Games like CardyHeim include Hollow Knight, Celeste, Super Meat Boy, SANABI, and Hollow Knight: Silksong. We matched them by the tags players give CardyHeim on Steam (Adventure, Card Battler, 2D Platformer, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · 2D · Adventure

Celeste
Shared: Platformer · 2D Platformer · Indie

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

SANABI
Shared: Adventure · 2D Platformer · 2D

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

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

Dust: An Elysian Tail
Shared: Platformer · Adventure · 2D

LIMBO
Shared: Platformer · Adventure · Indie

Mark of the Ninja
Shared: Platformer · 2D · Adventure

Neva
Shared: Adventure · Platformer · Indie

BEEP
Shared: Adventure · Platformer · 2D

GRIS
Shared: Adventure · Platformer · Indie

Rain World
Shared: Platformer · 2D · Indie

Reventure
Shared: Adventure · Indie · 2D

Slay the Spire
Shared: Card Battler · Deckbuilding · Singleplayer

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

Rayman® Legends
Shared: Adventure · Platformer · 2D

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

Owlboy
Shared: Adventure · Platformer · 2D

Dead Cells
Shared: Adventure · 2D · Platformer

VVVVVV
Shared: Platformer · 2D Platformer · Indie

Rogue Legacy 2
Shared: Platformer · Adventure · Indie

Smilemo
Shared: Adventure · Platformer · 2D Platformer

Gravity Circuit
Shared: Platformer · 2D · 2D Platformer