This is such a joyful program to use. The author seems to have made a whole custom gui with a classic aesthetic. Love the 3d design, animations and colors. Author's website is also a gem.
There's a good amount of built in brushes, plus a node editor I haven't figured out how to use yet, but it seems quite powerful. The interface seems translated from chinese, so a little confusing in places, and some of the naming is strange, but it's workable.
I'm using it with a XPPen Tablet, which does not seem to work with v0.2, works on 0.2a but only with wintab driver. Would be cool to have some stuff like shift+drag for zoom to make using a graphics tablet better.