To the best of my knowledge it is a probability game. For example, some of the circles have point values, while others say game over. The challenge back in 1989 was to get two cards and challenge a buddy to see whom could acquire the largest point total.
Back in 1989 Nintendo released packs of cards with various Nintendo titles- Super Mario, Zelda, Mike Tyson's Punchout, etc. The set consisted of 60 of these scratch off cards and 33 stickers. It was a very fun set to collect. I have the entire set and finally decided to get rid of my duplicates. I am down to only about 8 or 9 duplicates left and this is one of them.