This is an example app I created to demonstrate some of the basic functionality built into the PocketSprite. It includes functional demonstration of the µGUI, sndmixer and powerbtn_menu libraries.
The .bin file can be directly uploaded to the device using the web UI. You can get a pre-compiled version from the Releases section.
In order to build, you will need to follow the steps found in the official documentation.
I've written a full tutorial on how to make this app, which you can read here.
You can see a fully working version of the project here: https://www.youtube.com/watch?v=6saBGZv-WCc