Robtop

Overview
Robert Nicholas Christian Topala, also known as RobTop, known jokingly as RubRub, and as Zhenmuron on Reddit and formerly Newgrounds, is a Swedish game developer who involves himself in programming, animation, and music production. He is the founder of RobTop Games and has created several mobile games such as Boomlings, Boomlings MatchUp, Memory Mastermind, Geometry Dash and it's lite version and expansions.

Newgrounds
https://robtop.newgrounds.com/