Sure, here's an example of a clicker game implemented as a single HTML file:
This code creates a simple clicker game where each click increments the points by 1. You can upgrade your clicks with points, and the upgrade cost doubles each time. You can also buy auto clickers to automatically increment points every second. The cost for upgrades and auto clickers also doubles with each purchase.
Please note that this code is a basic implementation to demonstrate the concept of a clicker game. You can customize it further with pictograms and additional features as per your requirements.