Sure! Here's a simple aiming game implemented as a single HTML file using JavaScript. It is designed to be played on a smartphone and uses pictograms for the visual elements.
To play the game, you can copy the above code into a new HTML file and open it in a browser on your smartphone. The game consists of a circular target that moves to a random position whenever it is hit with a touch/click. Your objective is to touch/click on the target to increase your score.
Please note that the gameplay in this implementation is very basic, and you can enhance it by adding levels, timers, and other features as desired.