Personally I'd prefer if it's designed solo-first, because solo has different challenges from group games. But since you say it's mostly solo, I'd say it's fine if you include variant rules involving group play.
Thank you! I'm still figuring out what I want to do with it, so I am tweaking a lot of things, but it is designed with solo play in mind simply with an optional variant if you wanted to play with others, but it's meant to be solo game!
