I really enjoyed the free sample, and was immediately hooked on this fun way to colour. There are definitely improvements needed(the pen is very fuzzy, lines are always bleeding and pixelated and making detail difficult). Not having a fill option is a huge disappointment. I bought the full pack and now every time I try to open a new drawing the app crashes. I completed one drawing which took me hours. It was saved. I finally got another to open and when I went back to the first, Ive lost the saved drawing and have the progress of the new drawing overlaid on the first(the coloured shapes of Van Gogh but laid out on the Lennon portrait) I dont understand how apple lets developers like this get away with stealing my money.