Games like Balloon Girl
Games like Balloon Girl include SANABI, Celeste, Pizza Tower, Webbed, and Katana ZERO. We matched them by the tags players give Balloon Girl on Steam (2D Platformer, Indie, Pixel Graphics, Singleplayer, and Relaxing): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Pixel Graphics · 2D Platformer · Action

Celeste
Shared: Pixel Graphics · Indie · 2D Platformer

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

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

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

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

Super Meat Boy
Shared: Indie · 2D Platformer · Pixel Graphics

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

Vampire Survivors
Shared: Pixel Graphics · Indie · Singleplayer

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

DAVE THE DIVER
Shared: Pixel Graphics · Relaxing · Singleplayer

Downwell
Shared: Pixel Graphics · Indie · 2D Platformer

Timberman
Shared: Indie · Pixel Graphics · Casual

Exit the Gungeon
Shared: Indie · Pixel Graphics · Action

Broforce
Shared: Pixel Graphics · Action · Indie

UFO 50
Shared: Indie · Pixel Graphics · Action

VVVVVV
Shared: Pixel Graphics · Indie · 2D Platformer

Slime Rancher 2
Shared: Singleplayer · Relaxing · Cute

A Short Hike
Shared: Indie · Relaxing · Pixel Graphics

The Messenger
Shared: Pixel Graphics · Indie · 2D Platformer

FEZ
Shared: Indie · Pixel Graphics · Singleplayer

Owlboy
Shared: Pixel Graphics · Indie · Adventure

Gravity Circuit
Shared: Indie · Pixel Graphics · Action

Unpacking
Shared: Relaxing · Pixel Graphics · Casual