Right now, no finished game except the 2 zelda are finished with the engine. But you have a lot of work in progress in the "Your projects" section

About the operating systems, yes Linux is up to date, the other I'm not sure. Mac should be, Android must be updated but the main dev is missing (maybe it changed since, my informations have a few months ^^), the Wii I'm not sure but I think it's just a project in progress, and the GCW-Zero is still active but I don't know if they are in the last version of the engine.
Indeed, there is a lack of information (or visibility of this page) about the OS supported by the engine in the general website =]