As an AI language model, I can assist you in writing the code for a simple click speed game in JavaScript. However, please note that I cannot directly execute or test the code as I am a text-based AI. You can copy and test the code in an HTML file on your local machine or a web browser. Here's the code for the game:
This code creates a simple click speed game with a button that the user needs to click as many times as possible within 5 seconds. After the game ends, an alert will display the player's score.