I'm hesitant to say the game is systems complete considering there is no projectiles yet, so combat is mostly broken, and all of the other major systems are still having bugs or are missing non-critical features.
But, I am proud to say that the general game flow is working now. You can accept and finish quests (which can have conditions based on your city, inventory, or other completed quests), the days are added, and I've polished the dialogue system a bit. The building and movement system are basically doen with the exception of a few thing sI'd liek to add that should be simple, all of which is documented on the trello board right now.
There's still a long way to go for art and of course actually creating quest content from a general story idea into the game itself. But in terms of the game flow you can actually create quests the span multiple days now and the game flow is starting to take form.