So I made a toy that plays winamp shaders to live music from a local radio station of mine https://www.radiobingus.org/
It also has chat features where your messages will be randomly garbled into barely comprehensible text!
This was made entirely in the engine, and I mostly did it as a way to mess around with the tech.
Also converted @yaustar 's mobile controls Touchscreen Joypad Controls | PlayCanvas Developer Site to work in-engine, might open source that at some point.
Enjoy!!