There is no magic formula to make a commercially successful game. It needs a truly well-made game + lots of advertising/marketing + some amount of luck. And the fact that you are willing to sell your game for only one dollar tells me selling and marketing seem not to be your strong sides. One dollar doesn't even cover basic expenses (for itch.io and for Paypal for instance). And what does one month mean? Why must it be one month? The time needed depends mainly on your project and your skills. We don't know about either, how should we judge? And what about your resilience? Do you throw away a project at the first difficulty or do you work on it until all problems are solved? If you like making games, do it for fun; if they sell, good; otherwise you still had fun making them. If you want to make money from game-making get the necessary skills and seek work at a game studio.