Here's the shader for the glitched font:
Vertex shader: https://gist.github.com/maximi...
Fragment shader: https://gist.github.com/maximi...
Its not particularly optimized (I should replace the "if" in the fragment shader) or documented but you probably get the gist. :)
Not sure about the level editor. It would take a lot of time to polish it to a state where its usable by anybody but me :D I have basically no GUI and rely almost solely on keyboard shortcuts. Not exactly intuitive ;)