Sure! Here's an example of a simple downhill cycle game implemented as a single HTML file with JavaScript. It uses pictograms to represent the player and obstacles.
Note: This is just a basic implementation to showcase the game concept. Additional features and optimizations can be added as per your requirements.
< html>
To play the game, simply copy the above code into a new HTML file and open it in a web browser. You can control the player using the left and right arrow keys on your keyboard. The goal is to avoid the obstacles and see how far you can go. When a collision occurs, the game shows the final score and restarts.
Note: This is a basic implementation and can be enhanced further with additional graphics, levels, and features to make it a more complete downhill cycle game.