Games like Just Cube
Games like Just Cube include Celeste, Super Meat Boy, SANABI, VVVVVV, and Downwell. We matched them by the tags players give Just Cube on Steam (Precision Platformer, Platformer, Difficult, Boss Rush, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · Platformer

Super Meat Boy
Shared: Precision Platformer · Platformer · Difficult

SANABI
Shared: Pixel Graphics · 2D Platformer · Platformer

VVVVVV
Shared: Precision Platformer · Platformer · Pixel Graphics

Downwell
Shared: Precision Platformer · Platformer · Pixel Graphics

Jump King
Shared: Precision Platformer · Difficult · Platformer

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

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

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

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

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

The Messenger
Shared: Platformer · Pixel Graphics · Retro

NINJA GAIDEN: Ragebound
Shared: Platformer · 2D Platformer · Pixel Graphics

Hollow Knight
Shared: Platformer · Difficult · Singleplayer

Pogostuck: Rage With Your Friends
Shared: Precision Platformer · Difficult · Platformer

Volgarr the Viking
Shared: Platformer · Difficult · Retro

Skul: The Hero Slayer
Shared: Pixel Graphics · Platformer · Difficult

Dungeon Escape
Shared: Precision Platformer · Difficult · Platformer

Bloodstained: Curse of the Moon
Shared: Platformer · Pixel Graphics · Retro

Sonic Mania
Shared: Platformer · Pixel Graphics · Retro

Electronic Super Joy
Shared: Platformer · Difficult · Precision Platformer

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

Angry Video Game Nerd Adventures
Shared: Platformer · Difficult · Pixel Graphics

Alex Kidd in Miracle World DX
Shared: Precision Platformer · Difficult · Platformer