Now that's a very attractive return to the game ! Your Junior Boomerang interacts wonderfully with the scenery and the paths below. The near misses are delightful. The architecture is sophisticated enough and conveys flawlessly a genuine atmosphere. I agree with scw55 concerning the out-of-place use of in-game foliage, but otherwise your scenery is really brilliant. Also, kudos for using a stand or sort-of
My only other (minor) complain is the slight lack of detail of your paths. They seem not to have bins, lightning and benches. Also, what set do you use for your path railings ? I love them !
For a theme you could explore, I suggest a "Legends/Myths" general tone. It would suit your first zone (given you've used a dragon in your first pics) and would still be flexible enough for articulating very different sub-themes.
Examples :
Egyptian/Greek mythology
Chinese warrior legend
Horror legend (werewolf, vampire, etc...)
But scw55's idea is good too !
Anyway, I'm looking forward to more
Best regards,
Portem!ne