Oh yeah this is some good stuff!
Nothing overstays its welcome and they are all catchy, groovy, and fun!
You used orchestration techniques to fit the theme which I always appreciate!
I can't decide if I like Solar City or Whimsical Ferrous Blossom more. Actually, after relistening to them, I like Solar City the best. because of the part that plays at 33 seconds it's really good!