Sure! Here's an example of a simple game implemented as a single HTML file with JavaScript. The game is called "Pictogram Memory":
Pictogram Memory
You can copy and paste the above code into a new HTML file and open it in your web browser. It will display a game board with pictogram cards. Your goal is to match all the pairs of pictograms by flipping two cards at a time. If the pictograms match, the cards will stay flipped, and if not, they will be flipped back. Once all the pairs are matched, a message will appear congratulating you and the game will reset.
Have fun playing the game!