Games like Blast Hopper
Games like Blast Hopper include Hollow Knight, Ori and the Will of the Wisps, SANABI, Nine Sols, and Hollow Knight: Silksong. We matched them by the tags players give Blast Hopper on Steam (Twin Stick Shooter, 2D Platformer, Action, Hero Shooter, and Metroidvania): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Platformer · Atmospheric

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

SANABI
Shared: Action · 2D Platformer · Platformer

Nine Sols
Shared: Metroidvania · Action · Platformer

Hollow Knight: Silksong
Shared: Metroidvania · Platformer · Indie

Rusted Moss
Shared: Action · Metroidvania · 2D Platformer

Owlboy
Shared: Metroidvania · Platformer · Action

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Metroidvania · 2D Platformer

Castlevania: Belmont's Curse
Shared: Action · 2D Platformer · Metroidvania

Pizza Tower
Shared: 2D Platformer · Action · Platformer

Constance
Shared: Metroidvania · Action · Platformer

Prince of Persia The Lost Crown
Shared: 2D Platformer · Metroidvania · Action

The Messenger
Shared: Metroidvania · Platformer · Action

MIO: Memories in Orbit
Shared: Metroidvania · Atmospheric · Platformer

Rain World
Shared: Atmospheric · 2D Platformer · Platformer

Rogue Legacy 2
Shared: Action · Metroidvania · Platformer

Dust: An Elysian Tail
Shared: Action · Metroidvania · Platformer

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

BioGun
Shared: Metroidvania · Twin Stick Shooter · Atmospheric

Dead Cells
Shared: Metroidvania · Adventure · Action

Katana ZERO
Shared: Action · 2D Platformer · Platformer

Sonic Superstars
Shared: Action · 2D Platformer · Platformer

Axiom Verge
Shared: Metroidvania · Action · Platformer

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Metroidvania · Action