It's very, very laggy (i.e. you draw and it takes a second to actually appear on the screen). I found a few bugs from just a few minutes of playing with it. Also, the pen drawing doesn't line up with where you click on the screen, it's slightly misaligned. As of writing this, the last update was 4 years ago.

идея хорошая, но не корректно работает. зависает. Windows 10, 64