Games like Gisselle's Adventure
Games like Gisselle's Adventure include SANABI, BlazBlue Entropy Effect, Celeste, Anomaly Agent, and Demon Slayer -Kimetsu no Yaiba- The Hinokami Chronicles. We matched them by the tags players give Gisselle's Adventure on Steam (Action, Adventure, Action-Adventure, 2D Fighter, and Visual Novel): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · Adventure · 2D Platformer

BlazBlue Entropy Effect
Shared: Action · Action-Adventure · Platformer

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

Anomaly Agent
Shared: 2D Platformer · Platformer · 2D Fighter

Demon Slayer -Kimetsu no Yaiba- The Hinokami Chronicles
Shared: Action · Adventure · Action-Adventure

Sonic Superstars
Shared: Action · Adventure · Platformer

Ori and the Will of the Wisps
Shared: Action · Platformer · Adventure

Black Myth: Wukong
Shared: Action · Action RPG · Action-Adventure

I wanna be the Creator
Shared: Action · Action-Adventure · Adventure

Trine 5: A Clockwork Conspiracy
Shared: Action · Adventure · Action-Adventure

Prince of Persia The Lost Crown
Shared: Action · Adventure · Action-Adventure

Pumpkin Jack
Shared: Action · Adventure · Platformer

God of War Ragnarök
Shared: Action · Adventure · Action-Adventure

Webbed
Shared: 2D Platformer · Platformer · Action

Super Mombo Quest
Shared: Action · Adventure · Action-Adventure

Castlevania: Belmont's Curse
Shared: Action · Action-Adventure · Platformer

Monster Boy and the Cursed Kingdom
Shared: Action · Adventure · Platformer

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

Skul: The Hero Slayer
Shared: Action · Platformer · Indie

Rusted Moss
Shared: Action · Platformer · Adventure

Katana ZERO
Shared: Action · Platformer · 2D Platformer

SCARLET NEXUS
Shared: Action · Adventure · Action-Adventure

Owlboy
Shared: Adventure · Platformer · Action

Phoenotopia: Awakening
Shared: Action · Adventure · Platformer