Sure, here's an example of a simple game written in a single HTML file using JavaScript, enclosed within script tags:
Superman Flying Game
In this example, the player controls Superman's movement using arrow keys on a smartphone. The superman.png should be replaced with an actual path to your desired Superman pictogram image file. The game canvas is a 400x400 square where Superman can move around within the boundaries.
Please note that in order to use this code, you will need to replace the `emozi_himawari.png` path with the path to your desired Superman pictogram image file.