Game covers are definitely important, which is why I plan to have a new title screen and cover created not too long from now, at least before the final game releases.
I know quantity of games won't make a difference, I just feel that our next idea, which will use more traditional art, at least more so than pixel art, might appeal more to visual novel players. Plus, we'll have more experience advertising. While we did get quite a few players and some followers by releasing the demo and advertising, dev logs also helped get some eyes on the game, so we definitely will continue doing that in later games.
What strategies do you think might help you, other than improving your game covers?