Sure, here's a simple example of a game implemented as a single HTML file using JavaScript and enclosed in script tags:
Picture Puzzle Game
In this game, you will see a canvas with a grid of cells containing random pictograms. The objective of the game is to rearrange the pictograms by clicking on adjacent cells, until they are back in their original order. Once the puzzle is solved, a congratulatory message will be displayed.
Please note that this is a basic example and can be expanded upon to add more features and complexity as desired.