Sure, here's an example of a simple game called "Godzilla Attack" implemented as a single HTML file using JavaScript and enclosed in script tags. Note that this is a basic example and can be expanded upon to add more features, levels, or graphics.
Godzilla Attack
Score: 0
Game Over
In this simple game, you control a player represented by a blue rectangle using the left and right arrow keys on your smartphone. The goal is to avoid colliding with the Godzilla pictogram (represented by a background image) falling from the top of the screen. Your score increases by 1 point every second. If the player collides with Godzilla, the game ends and the "Game Over" message is displayed.
Note: Make sure to replace the `emozi_cat.png` URL in the CSS with the actual path to your Godzilla pictogram image for it to be displayed correctly.