Hello! To use the ziptrainer, download this repo, navigate to the directory in your terminal, and run python3 ziptrainer.py. Press ctrl + C to exit.
You can configure the script by editing the INPUT_DELAY_SEC, INPUT_WINDOW_SEC, and FPS global variables. They're at the top of the script. I wasn't sure what the timings are for a zip, so at present you'll have to adjust that yourself :)
At this point the only key recognized by the script is W. If this script is useful I'd be happy to add more inputs.