Timmie (DDRKirby(ISQ)), or simply DDR, is a game developer and chiptune musician. She makes a lot of games for game jams, or competitions for making a decent game for a theme in a certain span of time, like the Ludum Dare Game Jam.

In terms of music, DDR makes a lot of 9-bit instrumentals and epic soundtracks. She is well known for her ability to put together a good song in little time because of her experience participating in One Hour Compo, a music-making competition where contestants make a song in a short timeframe. She is also a glowstick performer and posts tons of videos on her YouTube channel performing. Her friend, Kat Jia, makes all of her album covers.