Games like Mixx Island
Games like Mixx Island include Broforce, ShellShock Live, My Friend Pedro, Muse Dash, and Cat Goes Fishing. We matched them by the tags players give Mixx Island on Steam (Action, Casual, Shooter, Side Scroller, and 2D): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · 2D · Shooter

ShellShock Live
Shared: Action · 2D · Shooter

My Friend Pedro
Shared: Action · Shooter · Indie

Muse Dash
Shared: Cute · Casual · 2D

Cat Goes Fishing
Shared: 2D · Casual · Cute

Skul: The Hero Slayer
Shared: Action · 2D · Indie

pureya
Shared: Casual · 2D · Side Scroller

Gensokyo Night Festival
Shared: Action · Casual · Indie

DJMAX RESPECT V
Shared: Casual · Action · Cute

Pikuniku
Shared: Casual · Action · Cute

How to Fish
Shared: Shooter · Indie · Action

Zombotron
Shared: Action · 2D · Shooter

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

Planes, Bullets and Vodka
Shared: Action · Casual · Shooter

ICEY
Shared: Action · Side Scroller · 2D

Geometry Dash
Shared: 2D · Colorful · Singleplayer

Haunt the House: Terrortown
Shared: Casual · Action · Cute

Zup! S
Shared: Casual · 2D · Indie

Slime Rancher
Shared: Cute · Colorful · Casual

Timberman
Shared: Casual · Action · 2D

Kabuto Park
Shared: Casual · Cute · Nature

Montaro
Shared: Casual · Cute · 2D

Vampire Survivors
Shared: 2D · Casual · Action

Monster Boy and the Cursed Kingdom
Shared: Action · 2D · Side Scroller