Games like Belle Boomerang
Games like Belle Boomerang include Celeste, Shovel Knight: Treasure Trove, SANABI, Super Meat Boy, and Pizza Tower. We matched them by the tags players give Belle Boomerang on Steam (Platformer, Difficult, Action, Retro, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Difficult · Platformer · Pixel Graphics

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

SANABI
Shared: Action · Pixel Graphics · 2D Platformer

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

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

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

Bloodstained: Curse of the Moon
Shared: Action · Platformer · Retro

VVVVVV
Shared: Platformer · Pixel Graphics · Difficult

The Messenger
Shared: Platformer · Retro · Pixel Graphics

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

Jump King
Shared: Difficult · Platformer · Pixel Graphics

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

Blasphemous 2
Shared: Difficult · Fantasy · 2D Platformer

Volgarr the Viking
Shared: Platformer · Difficult · Action

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

Freedom Planet
Shared: Platformer · Action · Retro

Sonic Origins
Shared: Action · 2D Platformer · Platformer

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

Angry Video Game Nerd Adventures
Shared: Platformer · Action · Difficult

Hollow Knight
Shared: Platformer · Difficult · Indie

Sonic Mania
Shared: Platformer · Retro · Pixel Graphics

Cuphead
Shared: Difficult · Platformer · Retro

Hotline Miami
Shared: Action · Pixel Graphics · 1980s

Downwell
Shared: Platformer · Pixel Graphics · Action