How i can select button

I want to do a game for kids like this but I don't know how to move the button from one place to another like this picture with the same moving of finger in

mit app inventor

  1. You can turn the item into an ImageSprite, on top of a Canvas, and set the draggable property to True.
  2. Use a repositioning extension (you can find one by pressing forward slash, "/", and then typing your query).

Ok thanks,,yes i'm using imagesprite of corse ,, i will searching for this extension thank you