The desktop-archives Makefile target generates self-contained zip files for all desktop platforms. These zip files contain a reduced version of the JRE, so the player does not have to install Java separately.
On Linux, if you build the game yourself, you can use the install Makefile target to install it locally. It supports the classic DESTDIR and prefix variables. This should provide a good basis to anyone looking into building a distribution package for the game.
The game is packaged for Flathub. Its Flathub repository is flathub/com.agateau.PixelWheels.
The apk-archives Makefile target generates signed Android APK files. Generating these requires a valid android/signing.gradle file.
This file is confidential, so you need to create your own version of it. Have a look at android/signing-sample.gradle to see what it should look like.
At the moment there are two APK flavors: Google and itchio. The Google one does not contain the support links, because those are against Google Play policies.