The Guide and Exit buttons have been disabled on the web version
Click on the panel after the bar has finished loading, which says "Ready to Start!". To watch a checkers simulation, simply click play, and then choose the algorithms you want to watch compete. The algorithm listed first plays black. There will be a loading time after choosing an algorithm pair due to web throttling.
Please try not to click too fast, as too many inputs might cause issues with the inline web display. To use the program without throttling, and access features including simulating 100s of games at once, download the repository, and run the main.py file.
For information on how algorithms operate, and are implemented, please see pages 4 - 5 of the Documentation on the other page.