As of right now, it's a Windows exclusive title.
That being said, we're still looking into what we can do to bring it to other platforms. Stay tuned!
As of right now, the current scope of the project does not include multiplayer so that we may focus on delivering a wholly made single player experience.
When it's ready, which will be sometime between now and the release of the game.
We'd like to, but we'll focus on creating a complete product first without losing anything to a planned modding framework.
We'll provide WAV or MP3 versions of the soundtrack.
We'll send out a survey via Kickstarter sometime after the campaign ends and grab all the details we need from you when the time comes.
Don't see the answer to your question? Ask the project creator directly.