Sure! Here's an example of a simple game implemented as a single HTML file, enclosed in script tags, using JavaScript. The game is designed to be played on a smartphone and uses pictograms:
Simple Pictogram Game
🎮
👌
😎
🐱
Score: 0
This game consists of four pictograms displayed on the screen. Each time a pictogram is clicked, the score increases by one. If the last pictogram is clicked, a congratulations message is shown with the final score. You can modify the pictograms, add more levels, or customize the game as per your requirements.