Sure, here's an example of a simple text-based game implemented as a single HTML file using JavaScript. Please note that this is a minimal implementation to give you an idea, and you can customize and expand it further as per your requirements:
Pregnant Queen Game
As a pregnant queen, command your servants!
To play the game, simply copy-paste the above code into a text editor and save it as an HTML file (e.g., `pregnant_queen_game.html`). Then, open the file in a web browser (preferably on a smartphone for better experience) to start the game. Follow the prompts to give commands to your servants, and try to successfully complete four weeks as a pregnant queen.
Please note that this is a basic implementation, and you can enhance it by adding more features, such as choosing specific servants for tasks, introducing complications during pregnancy, adding visual elements using pictograms or images, incorporating a scoring system, etc.