Here's an example of a simple game implemented as a single HTML file, using JavaScript and enclosed in script tags. Please note that this is a very basic example and can be expanded upon to create a more complete game.
Impossible Game
In this game, the player starts by clicking on the game container. An obstacle (represented by the obstacle image) starts moving from left to right. The goal is to click again to stop the obstacle at the right time and reach the finish line (represented by the finish image). If the player stops the obstacle at the right position, a congratulatory message is displayed.
Please note that you would need to replace the placeholder image URLs (`emozi_bear.png`, `emozi_chicken.png`, `emozi_rabbit.png`) with the actual image URLs you want to use for your game. Additionally, you can customize the styles and add more features to make the game more engaging and challenging.