Ripping sprites using HxD

[Coolkatisa]

I tried using this thread to extract images from an app game called Unicorn's Wrath.
https://www.vg-resource.com/thread-33565.html
But the instructions they gave were unclear and I couldn't get the images. Can I have the clear and simple instructions for doing this? I'm autistic so I would be able to understand it better if it was simplified.