Sure, I can help you create a game using JavaScript within a single HTML file. Here's an example of a simple game called "Guess the Pictogram":
Guess the Pictogram
In this example game, users need to guess the word represented by a given pictogram. They enter their guess in the text input and click the "Submit" button to check if it's correct. The game will provide feedback and keep track of the user's score. Once all the pictograms are guessed, the game will end and display the final score.
Please save this code in an HTML file, open it in a browser (preferably on a smartphone for the best experience), and you can play "Guess the Pictogram" game. Enjoy!