Games like Little Slippey
Games like Little Slippey include Celeste, Super Meat Boy, Geometry Dash, SANABI, and Shovel Knight: Treasure Trove. We matched them by the tags players give Little Slippey on Steam (Action, Precision Platformer, Platformer, 2D, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · Indie

Super Meat Boy
Shared: Precision Platformer · Platformer · Indie

Geometry Dash
Shared: 2D · Precision Platformer · Platformer

SANABI
Shared: Action · Singleplayer · 2D

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

Downwell
Shared: Precision Platformer · Platformer · Action

Jump King
Shared: Precision Platformer · Indie · Platformer

Skul: The Hero Slayer
Shared: Action · Indie · 2D

VVVVVV
Shared: Precision Platformer · Platformer · Indie

Broforce
Shared: Action · 2D · Platformer

Vampire Survivors
Shared: 2D · Bullet Hell · Indie

Rogue Legacy 2
Shared: Action · Platformer · Arcade

Pizza Tower
Shared: Indie · Platformer · Action

Katana ZERO
Shared: Action · Platformer · Indie

Sonic Mania
Shared: Platformer · 2D · Action

Hollow Knight
Shared: Platformer · 2D · Indie

Exit the Gungeon
Shared: Action · Indie · Arcade

Bloodstained: Curse of the Moon
Shared: Action · Platformer · 2D

Rogue Legacy
Shared: Platformer · Action · Indie

The Messenger
Shared: Platformer · 2D · Action

Gravity Circuit
Shared: Action · Platformer · 2D

The End Is Nigh
Shared: Precision Platformer · Platformer · Indie

Volgarr the Viking
Shared: Action · Platformer · 2D

NINJA GAIDEN: Ragebound
Shared: Action · Platformer · 2D