Sure, here's a basic implementation of a Life Simulator game using JavaScript, enclosed in script tags within a single HTML file:
Life Simulator
In this game, you have three actions to choose from: Work (which increases your energy), Relax (which increases your happiness), and Study (which increases your knowledge). The initial values for energy, happiness, and knowledge are all set to 50.
Each time you click on an action, the corresponding attribute will increase by 30, and the updated values will be displayed on the screen.
Note: This is just a basic example of a Life Simulator game. You can expand and customize it further by adding more actions, introducing random events, or implementing a game loop for time progression.