By the way, I just installed Unity on my Ubuntu machine. It rins kinda good even with natvie Nouveau drivers(~25 FPS with one sphere that has a skybox based environment map, the ambient lighting and a directional light in scene with realtime shadows). It looks quite difficult UI now, but maybe because the free version has a very bad theme and I don't know if I can change it(I like the darker ones themes). However, if I learn it up, I can start to make something!
Yes! I am! I am running 64-bit by the way! Could you tell me some explainations on how to corretly export(builid) game for 64-bit linux so I can tet if it works?