This is a WebGL based "coloring book" app, which I wrote for a school internship.
Credit for the GUI icons goes to Rodney.

This application is fully CPU based, as I could not get shader-based drawing to play nicely with
WebGL. This means that no shaders are involved other than basic Unity shaders, and it entirely uses
non-shader code. This should work at 45+ FPS on mid to low spec systems, which is about as good as I
could get it for tools like the highlighter, which are very math heavy.

Any WebGL browser should support this, and a hosting can be found here: https://nnaapp.github.io/iCube-Coloring-Book/

I don't intend to work on this more, but I am happy to answer questions if anyone ever has them.