300 images of the coin, 150 averses and 150 reverses, divided into 50 sets of 6 coins each.

One of the easiest collecting goals is to collect all the images of small coins. This can be done by purchasing just a few canvases, as each canvas will drop 100 small coins at a time.
Collecting all images of medium, big and main coins will take time, as the canvases are generated randomly.