Games like Heartbeats
Games like Heartbeats include A Dance of Fire and Ice, Chippy, Beat Hazard, Nova Drift, and HYPER DEMON. We matched them by the tags players give Heartbeats on Steam (Psychedelic, Bullet Hell, Shoot 'Em Up, Arena Shooter, and Twin Stick Shooter): closest matches first, and among equally close ones the better-known games.
A Dance of Fire and Ice
Shared: Difficult · Rhythm · Psychedelic
Chippy
Shared: Bullet Hell · Shoot 'Em Up · Arena Shooter
Beat Hazard
Shared: Bullet Hell · Shoot 'Em Up · Twin Stick Shooter
Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arena Shooter
HYPER DEMON
Shared: Arena Shooter · Difficult · Bullet Hell
Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Difficult
Super Hexagon
Shared: Difficult · Arcade · Rhythm
Just Shapes & Beats
Shared: Bullet Hell · Difficult · Rhythm
Geometry Wars: Retro Evolved
Shared: Bullet Hell · Twin Stick Shooter · Arcade
LUFTRAUSERS
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Waves
Shared: Bullet Hell · Shoot 'Em Up · Twin Stick Shooter
Enter the Gungeon
Shared: Bullet Hell · Difficult · Twin Stick Shooter
BALL x PIT
Shared: Bullet Hell · Action · Shoot 'Em Up
Nex Machina
Shared: Bullet Hell · Twin Stick Shooter · Shoot 'Em Up
Vampire Survivors
Shared: Bullet Hell · 2D · Arcade
Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Bullet Hell · Shoot 'Em Up · Difficult
Ikaruga
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Shoot 'Em Up · Difficult
Titan Attacks!
Shared: Bullet Hell · Arena Shooter · Shoot 'Em Up
Everhood
Shared: Psychedelic · Bullet Hell · 2D
Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Action
Savant - Ascent
Shared: Shoot 'Em Up · Action · Bullet Hell
Time Wasters
Shared: Bullet Hell · Twin Stick Shooter · Arena Shooter
Mushihimesama
Shared: Bullet Hell · Shoot 'Em Up · Arcade