Sure! Here's a simple football game implemented as a single HTML file using JavaScript and enclosed in script tags. The game can be played on a smartphone and utilizes pictograms to represent different game elements. However, please note that this code is just a basic prototype and can be further enhanced with additional functionalities, animations, and visual improvements.
To play the game, open a new HTML file in a web browser (such as Google Chrome) and paste the above code into the file. Save it with a `.html` extension, then open the saved file in the browser. You can control the player's movement using the left and right arrow keys or the 'A' and 'D' keys on a keyboard. The objective is to score 10 goals by intercepting the ball with the player. Once you reach a score of 10, a game over message will be displayed.