Really great game! solid experience with great magic moments. I feel like there more room to explore and improve, definitely this game should get a sequence.

The prologue had a small island so it was easy easier to enjoy than the frog island on the gameplay side. frog island is too big and the character too slow...
However, frog island is more charming than the prologue. Show your plant the special things on the island is such a power writing, hits pretty hard.
While the character feels great to move around, there is no much reason to use any of it's moveset.
Lose items feels terrible, lose the drink after discarding it and having to wait another day, was terrible. Caring the egg back to the village, just for accidentally hit it on a lamp or throwing it instead of putting it down was the oppose of magic moment, everything is so far way. the teleport is not useful at all

The frogs are great, but they don't change enough during the days. a week system similar to farm sims, could improve our "time on frog island"

I really enjoyed my time on the game. Do reminds me the first Harvest Moon game ever, where you could only carry a item at time and the chance of actually lose the item if you throw it.

Thoughts cents about a sequence:

A ever change island layout, so the backtracking would not feel repetitive. and give the moveset more reason to be used and unlocked. Find a way achieve something similar to "Short hike", on the map and moveset aspect.
A Small island as the prologue, or a smaller islands and you had to move between.
Improved NPCS routines and more deep relationships.
I would mind at all for a coop experience.

I really wish the name was renamed to something which could allow a sequence on the name. not changed to "Time on Frog Island".
"Trading Time: on Frog Island" sounds cool, but focus too much on trading. The game kind of turns into living with a different culture and learn about them and even learning their ways, adventuring around islands and experiencing and discovering new stuff, which is probably the reason why the game did change names.
"Trading Time: Time on Frog Island" kind repeats the word "time"
"Time on: Frog Island", kind of work, like "Time on: Dinosaur Island". but "My time on" is already the name of other franchise would cause some confusing I guess.

Still I really hope this game get a sequence improving the experience, without a doubt, this could turn out like a unforgettable experience and super hit with some improvements