Suggestion:
Sometimes us parkinsons suffers wana draw in straight lines
Allow the drawer to lock axis (they can look anywhere, but only one axis / line of the canvas, centered off their aim, and sized by their set radius size, is paintable.)
lock x axis keybind/cmd [ , ] /L x ?
lock y axis keybind/cmd [ . ] /L Y ?
unlock axis cmd [ r ] /U ?
also
make a flat minimum # of likes check before the 15%, so if a few people are on, 1 guy can't just "like" a stuffty drawing. should save you some grief
