You need one cherry and one acorn to advance, but the game frequently gives you two cherries or two acorns, thus making it impossible to pass b/c the missing cherry/acorn only appears after you make your final move. This glitch has robbed me off three cotton candy wheels and two of the combo boosters.
Not to mention several lives.
I'd love to have those refunded to my account, but I'm guessing that won't happen.