It's one of my theories that whenever a virtual Theremin or Theremin-like physical instrument is made available to "play", the overwhelming majority of people trying it out will play "Good Vibrations"! I know I do. First thing I played on my Otamatone was GV.
Once you play through the sample melodies you can change keys and ranges by clicking on the "gear" icon lower left of the screen, so here's a few of Brian's classics you can play along with in their original keys:
Wild Honey - Slide a low G to a high G on the virtual Theremin scale and repeat as needed...lol
Good Vibrations chorus:
low C# slide up to high C#, then B A# B play 4 times
low D# up to high D#, then C# B# C# play 2 times
F up to high F, D# D D# play 2 times
I Just Wasn't Made For These Times Theremin solo:
F A# C A# C A# D G F D C A# then:
F G A# A C A# D G F D A# D D# D A# C (long slide down...) F (vibrato)