I don't think it's a matter of being a big studio or not, but more a matter of can a project retain the attention of a potential player long enough? It's a very saturated marketplace, and it seems your game is quite niche. Not only does your game have to be "good enough" it also has to land on people who are interested in that specific type of project.
Like others have said, congratulations on finishing a project, that in itself takes a lot. Now if you want more and success is something you're looking for, I'd advise looking inward and see what you can change to keep a potential player hooked, and try to find the people who are willing to not be polite and harshly criticize your game so you know what to improve.
I hope you don't let it get to you too much and you keep at it!