Games like Kula
Games like Kula include Geometry Dash, A Dance of Fire and Ice, Hollow Knight: Silksong, Hollow Knight, and Muse Dash. We matched them by the tags players give Kula on Steam (Casual, Side Scroller, 2D, Colorful, and Cartoony): closest matches first, and among equally close ones the better-known games.

Geometry Dash
Shared: 2D · Difficult · Colorful

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

Hollow Knight: Silksong
Shared: 2D · Indie · Singleplayer

Hollow Knight
Shared: 2D · Souls-like · Indie

Muse Dash
Shared: Casual · 2D · Colorful

pureya
Shared: Casual · 2D · Colorful

SUPER CHICKEN JUMPER
Shared: 2D · Arcade · Difficult

Turbo Pug
Shared: Casual · 2D · Indie

Bloons TD 6
Shared: Casual · Singleplayer · Cartoony

Game Dev Tycoon
Shared: Casual · Indie · 2D

Timberman
Shared: Casual · 2D · Indie

Cat Goes Fishing
Shared: 2D · Casual · Indie

Kingdom Rush Origins - Tower Defense
Shared: 2D · Casual · Singleplayer

The WereCleaner
Shared: Casual · Cartoony · Singleplayer

Vampire Survivors
Shared: 2D · Casual · Indie

Kingdom Rush - Tower Defense
Shared: 2D · Casual · Singleplayer

Montaro
Shared: Casual · Indie · 2D

Zuma Deluxe
Shared: 2D · Casual · Arcade

Zup! S
Shared: Casual · 2D · Indie

A Game About Feeding A Black Hole
Shared: Casual · 2D · Indie

Cuphead
Shared: 2D · Difficult · Indie

Peggle Deluxe
Shared: Casual · 2D · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Casual · Singleplayer · 2D

Plague Inc: Evolved
Shared: Casual · Indie · Singleplayer