Here's an example of a simple game implemented as a single HTML file using JavaScript and enclosed in script tags. It features a smartphone operation with pictograms and a simulated main menu with game options. Note that this is a basic representation and does not fully implement the gameplay.
In this example, we have a main menu represented by the `<div>` with the id "menu". The menu includes a title, a list of games represented by pictograms (images), and a "Sign up" link on the top right corner.
Each game option has an `onclick` event attached to it which calls the `startGame()` function when clicked. The `startGame()` function can contain the logic for the actual game.
The "Sign up" link also has an `onclick` event attached to it, calling the `showSignup()` function which can handle the signup process.
Remember to replace the image URLs (`emozi_bear.png`, `emozi_chicken.png`, `emozi_rabbit.png`) with the actual image paths for the game pictograms.