Sure, here's a simple game implemented as a single HTML file using JavaScript, designed for smartphone operation and using pictograms:
Particle Game
Score: 0
This game is a simple particle-hunting game where the player needs to tap/click on a moving particle (represented by a blue square) on the canvas to increase their score. The score is displayed at the top, and each time the particle is successfully clicked, the particle's position changes randomly on the canvas, and the score is updated. The game is designed for smartphone operation and adjusts the canvas size accordingly.