Keeps freezing. Worthless – Pixel Art Book：Color By Number Review

I tried to color one picture, a photo I took. It keeps giving me this pop up about avoiding coloring the wrong blocks but the pop up won’t go away and I can’t do anything but close out the game and restart. Not worth the hassle. Definitely not something I’m gonna pay for. Deleting.
Review by Quickening on Pixel Art Book：Color By Number.