Sure! Here's a simple football game using a metal ball implemented as a single HTML file. It includes JavaScript code and uses pictograms for a smartphone interface. The game is a 2D side view, and there is one player on each team.
To play the game, you can use the W and S keys to control the blue player (player 1) on the left side. The Up and Down arrow keys control the red player (player 2) on the right side. The goal is to bounce the metal ball back and forth with the players and prevent it from crossing your goal line. Enjoy the game!