LCD-Game-Shrinker is a program that shrinks MAME high-resolution artwork and graphics for portable devices running LCD-Game-Emulator. You can read more on the projects GitHub page: https://github.com/bzhxx/LCD-Game-Shrinker
When creating this guide I used the FREE Oracle VM VirtualBox with Ubuntu 20.0.4.2 LTS running under Windows 10. This is a great way to get a build environment set up quickly.
Speaking of which, I've made a script called lcdsetup.sh
that automates upto and including Step 6 if you prefer which you can download here
Before we continue it's important that you make sure Ubuntu is updated or you'll be installing old outdated packages and get errors.