Sorry if I answer you only now. Your opinion is certainly more realistic. I think, however, that even if you have a not really winning idea, it can also count the quality of your production, the gameplay and the duration of the game, that is, basically the number of levels installed and the possibility of adding new. Indeed, sometimes, starting from an idea of success, already developed by others in various forms, just because the subject-character of that game is much loved, building a sequel, to which new features are added, can work.