This is SO SO cute, I love it. I'm having a hell time trying to make it work on Firefox specifically though. It seems that the UI wont let me interact with the sliders, and after I draw one line, the UI is frozen completely. I use a Huion display-tablet for drawing, and the UI only freezes AFTER I've drawn a line with the Huion. Using a mouse works fine, but if I draw with the HUION first, the UI freeze does carry over to the mouse as well.
Works as intended in Microsoft Edge though, haha!