Sure! Here's a simple example of a game where a cube bounces around the screen. The game can be played on a smartphone and uses pictograms to represent the cube.
In this game, there's a red cube represented by a pictogram. The cube bounces around the screen within a container element. The cube's position is updated every 20 milliseconds, creating the bouncing effect. The cube changes direction when it reaches the edges of the container.
You can copy the above code into a single HTML file, save it with a .html extension, and open it in a web browser (preferably on a smartphone) to play the bouncing cube game.