Hey, we're really glad you enjoyed Benefitship! Quality over quantity is very much what we were aiming for (although I think it would've served well from being a bit longer).
I did all the writing and music myself. I'm technically a programmer, though, so I'm working to improve in both of those areas. The music I made for Benefitship is some of the first I've done, as is most of the game (UI design, marketing, voice directing, and sound engineering is all me too).
We've just started development on a sequel, which you can follow on our Twitter/X/Blusky account, but it'll be a while before it's done. I'm actually bringing in a professional editor to help out on that, since my writing in the first was a bit rough at times. I'm still the only writer, though.
As for how long it took to make, it depends on how you count. We only had one artist (Sulcate) so much of the development time comes from their end. 17 months in total, I believe.
Hope that answers your questions!