Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript:
This game starts with a yellow square on the screen. When clicked, it turns into a red square with the text "Don't do that!". If clicked again, it spawns 100 rat images randomly on the screen. Note that you need to replace `'emozi_all/game.png'` with the actual file path to your rat image for it to work.
You can save this code in a file with a `.html` extension and open it in a web browser on your smartphone to play the game.