It's primarily a collection game. The 'action' of trowing the balls and spinning the thingies for balls doesn't amount to much. So in a sense, you can compare

It's primarily a collection game. The 'action' of trowing the balls and spinning the thingies for balls doesn't amount to much. So in a sense, you can compare it to a collector of virtual trading cards, but instead of buying card packs you get them from moving around.