Games like Little Witch's Carnival
Games like Little Witch's Carnival include Vampire Survivors, Skul: The Hero Slayer, Megabonk, Halls of Torment, and Death Must Die. We matched them by the tags players give Little Witch's Carnival on Steam (Action Roguelike, Action, Bullet Hell, Roguelite, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Hell

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Roguelite

Death Must Die
Shared: Action Roguelike · Bullet Hell · Roguelite

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Indie

BALL x PIT
Shared: Action · Roguelite · Bullet Hell

Hades
Shared: Action Roguelike · Roguelite · Action

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Action

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Roguelite

Dungreed
Shared: Action Roguelike · Action · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades II
Shared: Action · Roguelite · Action Roguelike

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Pixel Graphics

Sephiria
Shared: Action Roguelike · Roguelite · Action

Star of Providence
Shared: Action Roguelike · Bullet Hell · Roguelite

ScourgeBringer
Shared: Action · Action Roguelike · Indie

The Void Rains Upon Her Heart
Shared: Action Roguelike · Bullet Hell · Action

UnderMine
Shared: Action Roguelike · Roguelite · Action

Rogue Legacy
Shared: Action Roguelike · Action · Indie

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Roguelite

Dead Cells
Shared: Action Roguelike · Roguelite · 2D

Cult of the Lamb
Shared: Action Roguelike · Roguelite · Cute

Last Command
Shared: Bullet Hell · Action · Action Roguelike