Games like qrth-phyl
Games like qrth-phyl include Hylics, Manifold Garden, A Dance of Fire and Ice, Disillusion, and Post Void. We matched them by the tags players give qrth-phyl on Steam (Psychedelic, Procedural Generation, Experimental, Abstract, and Programming): closest matches first, and among equally close ones the better-known games.

Hylics
Shared: Psychedelic · Abstract · Indie

Manifold Garden
Shared: Abstract · Psychedelic · Experimental

A Dance of Fire and Ice
Shared: Psychedelic · Arcade · Indie

Disillusion
Shared: Psychedelic · Experimental · Abstract

Post Void
Shared: Psychedelic · Arcade · Procedural Generation

To The Core
Shared: Procedural Generation · Arcade · Retro

AudioSurf
Shared: Arcade · Procedural Generation · Indie

Townscaper
Shared: Experimental · Stylized · Indie

Lifeslide
Shared: Abstract · Arcade · 3D

Super Hexagon
Shared: Arcade · Indie · Psychedelic

Moncage
Shared: Abstract · Experimental · Indie

Tandis
Shared: Psychedelic · Abstract · Experimental

Superflight
Shared: Procedural Generation · Indie · Arcade

Children of the Sun
Shared: Psychedelic · Arcade · 3D

Golden Light
Shared: Procedural Generation · 3D · Psychedelic

Nodebuster
Shared: Arcade · Experimental · Abstract

Progressbar95
Shared: Experimental · Arcade · Abstract

Cargo Commander
Shared: Procedural Generation · Arcade · Score Attack

Milk inside a bag of milk inside a bag of milk
Shared: Experimental · Abstract · Retro

The Catacombs of Solaris Revisited
Shared: Psychedelic · Abstract · Procedural Generation

Lucid Blocks
Shared: Psychedelic · 3D · Atmospheric

Baldi's Basics Plus
Shared: Procedural Generation · 3D · Retro

Milk outside a bag of milk outside a bag of milk
Shared: Psychedelic · Abstract · Indie

Juice Galaxy
Shared: Psychedelic · Experimental · 3D