Sure! Here's a simple game implemented as a single HTML file that can be played on a smartphone. It uses pictograms and JavaScript for the gameplay.
This simple game is called "Ice in the School Festival." The objective is to control the ice pictogram using touch or mouse controls and navigate it within the canvas. You can move your finger or cursor horizontally to move the ice pictogram left or right. The game uses JavaScript's requestAnimationFrame to create a smooth animation loop.
Please note that this is a basic template, and you can add more elements, levels, or features to make it a complete game.