hit the numbers 1-7 in order to go to that chord. Green chords are the ones that are predictable (although music sounds better when there is a bit of unpredictability.) Hitting space will start the chords and hitting M will switch from its normal spot to the major one for 2, 3, 6, and 7
http://mugglinworks.com/chordmaps/GenericMap.pdf is the chord map this is based on