@Hamumu (Mike Hommel) is one of Growtopia's developers alongside @Seth & @Ubidev. Hamumu owns Hamumu Software and was Growtopia's art designer.
- He gave Phonecats the Phonecats Hat as a thank you gift for drawing more people towards Growtopia in its early stages.
- Hamumu's level is displayed as "?"
- Hamumu's main world is HAMUMUTOWN.
- Most event worlds (such as Growch, or Growganoth) are owned by @Hamumu.
Hamumu's GUI (Note that "?" level)
Hamumu in the world "GROWCH" during 2013's WinterFest Week
Hamumu's profile picture on the Forums.