Sure! Here's a simple example of a game implemented in a single HTML file, using JavaScript and enclosed in script tags. The game is called "Sml the Game" and it involves clicking on pictograms to earn points. It can be played on a smartphone.
Sml the Game
Score: 0
In this game, there is a container div that holds four pictogram elements. Each pictogram is represented by an emoji. When a pictogram is clicked, the incrementScore function is called with the corresponding amount to increase the score. The score is displayed at the bottom of the page.
To play the game, simply open this HTML file on a smartphone browser, and start clicking on the pictograms to earn points. The score will increase accordingly.