Sure! Here's a simple shooting game implemented in a single HTML file, using JavaScript. The game can be played on a smartphone and uses pictograms for visuals. To play the game, tap or click on the screen to shoot down the moving targets.
To play the game, simply save the above code as an HTML file, open it in a web browser on your smartphone, and tap/click on the screen to shoot down the moving targets represented by pictograms. The game ends when all the targets are hit. Have fun!