I’m trying to keep controls down to an absolute minimum. Besides, touchscreens, gamepads, and even keyboards (see Key rollover - Wikipedia ) will struggle with this many keys.
I don’t know whether this FAQ was official or not, but even if it was, things have changed since then. There will definitely be at least an iOS version. If (and only if) it goes well, then an Android version. Also, the mobile version will come out while we’re still in EA, most likely within the next month or two. This is what I’ve been working on full-time for the past two weeks (and also 2 more months intermittently)
These are internal changes, they do not affect players. The need for the Windows version is obvious, the Linux version is for the game servers (which run on Ubuntu), the macOS version is required as a stepping stone to the iOS version, and the iOS version is for the upcoming iPhone release.
I do not currently maintain an Android version. This will be done (much) later, if at all.