I've posted something of this nature on boosty last week.
While I do have a lot of internal docs tracking the progress, it's not like I have a single list of features for an entire update. Well, I kind of do, but it's very general, not something that can be called a 'roadmap'. I have ideas that I want to implement, but unless I already did it before, it's pretty much impossible to guess how much time a particular new thing would require.
Not to mention, that some of the ideas don't really go anywhere. It took me a good while to figure out how to code a new mini-game, with the procedural levels, new graphics and effects. I like having the freedom just to try stuff and to see what actually works, and if I had a deadline - it would be much harder.
I'm finally working on new dialogues, so that's a big development. I've spend last few months pretty much just writing code and only doing some art on the weekend.
I've rewritten most of the game code basically from scratch, this time having in mind all of the flaws of the old version, with the goal of creating a structure that would support a lot of interactions, dialogues and scenes. Now that this structure is ready (mostly), I'm working on the actual new content.
This might not be the answer you were looking for, but the whole process of development is pretty complex with a lot of moving parts, and I don't always know the right answers right away.
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