Hi Booxtor,
Great that you're still working on the scribbling!
Here is a strange bug I found. Sometimes the screen won't display a stroke you've made with the pen, but then if you go to "erase" and click anywhere on the screen the stroke appears!
Here is a video of the bug:
https://www.dropbox.com/sh/tusasi9jp...1wnEUuVQPMzNTa