My sister sent me this game last week. I got a 20 then......I'm pretty confident that is the lowest you can get on that game. I received the 20 when I did 7 rounds perfect and messed up early on the other 3. I kept trying to beat it and eventually did 8 perfectly, made it half way through the other two, and still received a 20....so something doesn't add up. For reference I'm 22 y/o......