"I need an idea of where to start from here" Well wouldn't you know it, being honest, apologizing, and asking for help are prime steps number 1, 2, and 3. The way I see it, the best course of action now is polishing this game to a workable state (Remove any "not available in this build" stuff and make an ending) and then get started on 3. If, in the process of working on 3, you feel a strong lingering desire to see your world fulfilled, at THAT point start thinking about/working on a port/sequel to this game. BUT! at the end of the day, the ball is in your court, and you are not me. Look at all the advice we give, look at yourself, and make a decision. If you regret it, you can stop or start again at any time. Ain't that just nifty?