Here is an example of a simple game implemented in a single HTML file using JavaScript and enclosed in script tags. This game is called "Pictogram Puzzle" and is played on a 6x6 canvas grid with 36 sectors and 36 subsectors. Players must match pictograms to complete each level.
Please note that this is just a basic structure for a game and you will need to implement the game logic, user interactions, and pictogram images to make it playable. Feel free to customize and expand upon this template to create a fully functional game.