Sure, here's a simple example of a game implemented as a single HTML file using JavaScript and enclosed in script tags. This game assumes smartphone operation and uses pictograms.
In this game, a canvas element is used to draw the player as a rectangle at the specified coordinates. The `handleStart` function is called when a touch event occurs, updating the player's position accordingly. The `gameLoop` function continuously clears the canvas, redraws the player, and updates the game logic. You can add more features, levels, and interactions to make it a complete game.