5 stars: Used to always steal my friends' phones to play this but now I can play it myself. The really complicated ones are my faves and I also like the really simple ones if I just want to do something quickly. Having different categories to search for certain types of images might be a good idea for the future, like a category for the subject or difficulty, but other than that it's a great app.
5 stars: Very addicting, I play it all the time to calm down or when I'm bored. I only have two suggestions; a dark mode for night players like me, the white can get hard on the eyes after a while. And also, perhaps a button to lock the screen in place when trying to do the long press colouring? Sometimes the screen slides all over the place if you don't do long press properly. Other than that it's a great game!!
4 stars: Love the coloring but sometimes I just like to color certain things. I think it would be better with a search option so you can type in what you want to color. If you wanted Christmas for example, that way you don't have to scroll back forever or try to find a book which contains ones you don't want to color anyway. Plus, when you just want to color something quick to kill time, you don't have to scroll for a long time.
2 stars: Way, way, way too many ads. Not relaxing. EDIT: Thanks for the response. On the topic of skipping ads after 5 seconds - a lot of them, you cannot. And when the ads interrupt the user mid-colour, and before and after opening the i...