Your game controllers are widgets, your score and game status are shown in a (heads-up) notification, and the action happens in a live wallpaper. It’s a tech demo - an experiment in what can be done with normally-staid home screen components - but it’s also surprisingly playable.
As a demo, this version of the app includes open-source renditions of three classic arcade video games, as well as an open-source pinball (arguably the most classic arcade game of all):
Home Screen Arcade itself is copyright 2017 Sterling Udell, and is distributed under the terms of the GNU General Public License 3.0. Source code is available at https://github.com/StringMon/homescreenarcade. Or, you can also download a playable APK.