Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript. The game involves finding keys to open a neighbor's basement, and it can be played on a smartphone. Let's assume that pictograms are used for the visual representation.
Neighbor's Home - The Basement Key
In this game, you initially see an image of the neighbor's home. By clicking on the image, the game responds with messages indicating whether the basement key has been found or not. The key image starts hidden, and once found, it appears on the screen. The game is ready to be played and the processing starts automatically.