Here's an example implementation of the Store Manager Simulator game using JavaScript in a single HTML file:
Store Manager Simulator Advanced
In this implementation, the game starts with restocking 20 units of stock and hiring an employee. Then it proceeds to view the current state of the store, sell some items, restock again, hire another employee, view the updated store state, and finally quits the game.
You can modify or extend this code to include more gameplay elements, graphics, and interactive features based on your requirements.