Currently I only have Mac support. If it's popular enough I'll make a Windows version.
Step 1: Download this zip file – https://github.com/aidswidjaja/PyongyangRacer/archive/refs/heads/main.zip
Step 2: Extract it to the Downloads folder (it won't work unless it's in the Downloads folder)
Step 3: Open pyongyangracer.bash in Terminal (right click > Terminal - or drag it in)
Step 4: Click "Don't Allow" when SeaMonkey asks to access your contacts.
Note: You may need to go into Security & Privacy settings to allow uncertified applications to run on your Mac.
This is an experimental build and hasn't been tested outside of my local dev environment.