Sure, I can provide you with a simple football game implemented as a single HTML file using JavaScript. Since you mentioned smartphone operation, I will make it a touch-based game and use pictograms for visual elements. Here's an example implementation:
This code sets up a simple football game where you control two players using touch gestures on a smartphone screen. The players are represented as yellow circles, and the ball is a white circle. The game logic includes collision detection between players and the ball, scoring goals, and resetting the game after a goal is scored. You can extend this basic implementation to add more features and improve the gameplay as desired.