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Well, the roadmap looks solid enough to me.
Also, perhaps the reason why Mofu is not able to finish what he planned is because real life problem gets in his way? Especially this is a creative works. Its progression is prone to the emotion and the mood of its creator. I more or less know how it feels, since I do drawing sometimes, and it's hard to get it done when suddenly your mood is wrecked by an unwanted real life problem that comes out from nowhere.
At least that's my guess.
The most difficult part of creating a game for me is creating an unknown system. This is because I cannot predict how long it will take. And I try to postpone content that builds on top of an already completed system because I can predict how long it will take. Then, when the system is mostly done, I can finally start producing the overall content.
Well, yes, of course. I didn't mean to say that drawing is the one holding him down. I was just making an example that creative work (like drawing, game developing, composing, etc) is affected by the mood or emotion of the person doing it, unlike office work or any other work that doesn't need creativity.