Image grid template


I’m not an unreal engine user but I’m looking to build a simple app that has an image of an object overlay with a grid covering the object and I want to be able to select part of the image by selecting squares within the grid using a stylus pen. I also want to be able to shade half of the square or a full square. Then the app should calculate the score which is the sum of the number of squares shaded.

I also want to be able to do the same with the back of the image.

Looking for direction or maybe some templates I could use to get started.