I enjoy producing and publishing music as a hobbyist.
Doing commissions and soundtracks for game projects.
Rhythm Game Level Design
During 2009 till 2013 I was very active as a mapper with username happy30 for the rhythm game osu! A game that currently has 20 million players.
The maps became very popular, with some having over millions of plays.
I was voted the most influential mapper that joined the game in 2008, and ranked 11th overal. (source)
I have also created levels for some of my own music tracks.