Sure! Here's an example of a simple game implemented as a single HTML file, enclosed in script tags, using JavaScript. This game is designed to be played on a smartphone and uses pictograms for visual elements:
In this game, the player (depicted by pictogram1) is controlled by dragging on the screen. The objective is to avoid collision with the enemy (depicted by pictogram2) as it moves down the canvas. The score increments each time the enemy passes the bottom of the canvas. The game ends when the player collides with the enemy, and the final score is displayed.