Games like Blink Atomic Music
Games like Blink Atomic Music include Vampire Survivors, A Dance of Fire and Ice, Beat Hazard, Incredibox, and Just Shapes & Beats. We matched them by the tags players give Blink Atomic Music on Steam (Bullet Hell, Casual, Rhythm, 2D, and Music-Based Procedural Generation): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · 2D · Casual

A Dance of Fire and Ice
Shared: Rhythm · 2D · Indie

Beat Hazard
Shared: Rhythm · Bullet Hell · Music-Based Procedural Generation

Incredibox
Shared: Casual · Rhythm · 2D

Just Shapes & Beats
Shared: Rhythm · Bullet Hell · 2D

Bit Blaster XL
Shared: Bullet Hell · 2D · Casual

Muse Dash
Shared: Rhythm · Casual · 2D

Soundodger+
Shared: Casual · Bullet Hell · Rhythm

Zup! S
Shared: Casual · 2D · Indie

AudioSurf
Shared: Rhythm · Casual · Music-Based Procedural Generation

Everhood
Shared: Bullet Hell · 2D · Psychedelic

Super Hexagon
Shared: Rhythm · Indie · Minimalist

Audiosurf 2
Shared: Rhythm · Casual · Music-Based Procedural Generation

Geometry Dash
Shared: 2D · Rhythm · Singleplayer

Neon Beats
Shared: Rhythm · 2D · Indie

Zup! X
Shared: Casual · 2D · Indie

DJMAX RESPECT V
Shared: Rhythm · Casual · 2D

Boneraiser Minions
Shared: Bullet Hell · 2D · Casual

Melvor Idle
Shared: Casual · 2D · Indie

Rhythm Doctor
Shared: Rhythm · 2D · Indie

Rhythia
Shared: Casual · Rhythm · 2D

Spin Rhythm XD
Shared: Rhythm · Casual · Controller

Planes, Bullets and Vodka
Shared: Casual · Bullet Hell · 2D

Beat Saber
Shared: Rhythm · Music-Based Procedural Generation · Singleplayer