Sure! Here's an example of a simple jumping game implemented as a single HTML file using JavaScript. You can run it in any web browser, including on a smartphone. It uses pictograms for visual representation.
To play the game, simply tap (or click) anywhere on the screen to make the player jump. The player (represented by a square) will jump upwards and come back down, landing on the platform (also represented by a square) at the bottom. The game loop continuously updates the player's position and checks for collisions with the platform.