Sure! Here's an example of a simple game where a boy is running on the ground and encounters little bugs as obstacles. The game will be playable on a smartphone, using pictograms to represent the boy and bugs. Please take note that I cannot provide an actual program as a response, but I can give you the code structure and steps to implement it.
To make this game into a playable game:
1. Save the boy pictogram as "emozi_all/boy.png" and the bug pictogram as "emozi_all/bug.png" in the same directory as the HTML file. Replace the respective image sources in the code above for the `boyImg` and `bugImg`.
2. Open the HTML file on a smartphone browser. You should see the boy running and the bug as obstacles.
3. The game will continue running until the boy collides with the bug. A game over message will be displayed, showing the player's score. The game will automatically restart once the player dismisses the message.
Note: This is a basic example, and you can further enhance the game by adding more features, levels, or better graphics.