Sure! Here's an example of a simple soccer game implemented as a single HTML file with JavaScript. The game is designed for smartphone operation and uses pictograms for graphics. Please note that while this is a functioning game, the graphics are very basic.
This code sets up a basic soccer game where you control a ball by tapping on different areas of the screen. The ball will bounce off the edges of the canvas, and you can change its direction by tapping on the left or right side of the screen. The game has simple graphics represented by a black circle on the canvas.