Seth Robinson runs Robinson Technologies, an independent game developer located in Japan that prides themselves on making unique and interesting games. His insignificant contribution to the magic of Growtopia lies on the code side - the bugs are his fault. Well, most of them.
His in game name is @seth
His in game name is @seth
Mike Hommel runs Hamumu Software, proud creator of Dumb Games For Your PC (and sometimes Mac). He is largely responsible for the astonishingly gorgeous artwork you see in Growtopia. Also for the text on this website.
His in game name is @hamumu
His in game name is @hamumu