Sure, here's an example of a simple roller coaster game implemented as a single HTML file with JavaScript using pictograms:
Roller Coaster Game
Score: 0
In the provided code, there is a button ("roller-coaster") that can be clicked to increase the score. The game starts automatically, and the score increases every time the button is clicked. When the game is over, the button gets disabled, and a "Game Over!" message is displayed.
Note: In the code, the `img` source is set to "emozi_himawari.png". You can replace it with an actual URL or use your own custom pictogram image by creating it and placing it in the same directory as the HTML file.