It feels really smooth, but when you click you get the full size brush stroke while if you click and drag you get a thin stroke that gets thicker... that is the opposite of how actual painting strokes work - the strokes would start big and get smaller.

It is a nice start, it just does not feel natural.

Just made first update release fixing some minor bugs, if you are an artist, consider creating even some basic artworks using my app and send it to me if you want me to use it on the website that i am creating for the app of course with full credit given back to you, thank you!