Click the SPIN button.
100% lucky is very, very, hard.. That's why I added the CHEAT button. Also, if you land on the black space between things, then you are insanely lucky. It's not impossible, and I know this because I actually got it. Played this for, like, the first time in forever, and now I get 100% almost every time. So don't complain that 100% is impossible.