Touch PRO is for Touch Green players reaching 100 points (Touch Green is FREE). 

Touch Green rules: collect green stars, do not touch red blocks. Enjoy chords. Try: are you fast enough to collect 100 stars? Test takes less than one minute.

Use Ring/Silent switch to control speaker sound on/off (headphones always on), volume +/- buttons ("physical", on the left side of iPhone) control sound volume. 

Touch PRO: unlimited points, surprises, not only stars and blocks, new chords and more... Beta testers reached 1000+ points.