I have never heard of PixilArt, but I use Piskelapp.com to make my sprites.
Edit: I checked, and it’s basically like Piskelapp.com
Edit 2: The thread where I posted my videos, I deleted them because they weren’t so entertaining to watch.
Edit 3: I completely forgot to add that I have tweaked Kala.
The lightning effects aren’t so remarkable, but it’s something at least.