I love Nonograms or what ever you want to call them, this one is ok but I feel it could be marked higher, why?. The way you input your marker is slow and annoying to say the least.
You have an horizontal and vertical indicator that you have to move to the square you want to fill. Feels cumbersome and out dated in todays touch screen world, so if you have to fill a line that has 10 squares to fill, this means you have to move the aiming square to each and every square to fill that line.
Sad to say that I have deleted this app from my 5 Gen 10 tablet .