Games like Music Summoner
Games like Music Summoner include Vampire Survivors, Broforce, Planes, Bullets and Vodka, LUFTRAUSERS, and Skul: The Hero Slayer. We matched them by the tags players give Music Summoner on Steam (Action, Shooter, Bullet Hell, Pixel Graphics, and Fantasy): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · 2D

Broforce
Shared: Action · Pixel Graphics · Shooter

Planes, Bullets and Vodka
Shared: Action · Bullet Hell · Shooter

LUFTRAUSERS
Shared: Bullet Hell · Action · Pixel Graphics

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

Gensokyo Night Festival
Shared: Action · Pixel Graphics · Indie

Enter the Gungeon
Shared: Bullet Hell · Pixel Graphics · Action

Rabi-Ribi
Shared: Bullet Hell · Pixel Graphics · Action

DELTARUNE
Shared: Pixel Graphics · Bullet Hell · Singleplayer

Exit the Gungeon
Shared: Action · Bullet Hell · Pixel Graphics

Rocket Rats
Shared: Bullet Hell · Pixel Graphics · Action

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

BioShock Infinite
Shared: Action · Shooter · Singleplayer

Hotline Miami
Shared: Action · Pixel Graphics · Indie

Warhammer 40,000: Boltgun
Shared: Shooter · Action · Pixel Graphics

Death Must Die
Shared: Bullet Hell · Pixel Graphics · Action

SANABI
Shared: Action · Pixel Graphics · Singleplayer

Unpacking
Shared: Relaxing · Pixel Graphics · Cute

Bit Blaster XL
Shared: Bullet Hell · Shooter · Action

DJMAX RESPECT V
Shared: Action · Singleplayer · Cute

DRAINUS
Shared: Action · Shooter · Bullet Hell

Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · Retro

Megabonk
Shared: Bullet Hell · Action · Pixel Graphics

Angel at Dusk
Shared: Action · Shooter · Bullet Hell