Sure, here's a simple game in which you (represented by a CPU) go against bosses. The objective is to score 5 points before your opponent (also a CPU) does. The game will be played on a smartphone, using pictograms for visuals.
To play the game, simply copy the code into a new HTML file and open it in a web browser on your smartphone. When you click on the screen, rounds will start and bosses (represented by pictograms) will battle. The first one to score 5 points wins the game!