Sure! Here's an example of a simple bike racing game implemented as a single HTML file using JavaScript and enclosed in script tags:
This code will create a bike racing game where you need to avoid obstacles by moving the bike left or right using the arrow keys. The game will end if the bike collides with any obstacle. The game is designed to be played on a smartphone, and pictograms can be added as background images for the bike and obstacles if desired.
Note: The code provided is a basic example and can be expanded upon to add more features, levels, and graphics as per your requirements.