But Stardew Valley is a much better name.
You may be right that a good name or a different engine won't save a game, but I don't think the game you chose as your point is one to demonstrate that.
> But people really like that game.
It seems most people haven't played it.
And there are often game with, say, awful graphics, that are awesome to play. It happens. That doesn't mean you should bank on it.