Run, jump, chop, simplify, and try not to get beaned by ugly fractions.
Collect already simplified fractions for points.
Touch unsimplified fractions and they bonk you backward and steal that amount of points.
Use the panel at right to simplify the fraction you're nearest to, then hit Chop Fraction.
Once you reach 10 points, a hat may appear. With the hat on, Chas can fly.