So I played through what I believe is essentially just a way to show the world map and I have to say that everything is very basic, but well made. The small cities are currently all copy-pastes, but I like the design of the GUT building (altough it looks a bit too modern?) And the idea that each city has progressively stronger equipment/spells already makes me figure out a rough order for the story.
The little amount of written text to read I've found is alright I suppose, there are some small dialogues that I found pretty funny. There really isn't much here right now, though.
The MC looks cute!
The battle system needs some balancing. Having three turns in a row seems excessive, and against single enemies (like the "bosses") it's a guaranteed win with Devour>Digest>Digest. I assume these test fights were mainly to test out each "class" option and their skills, so it makes sense that you haven't properly balanced them yet.
Last but not least, EXCELLENT music choice. I love Sea of Stars and The Messenger, so it unironically made my day to hear those (quite fitting) OSTs (kinda sad you didn't use Glacial Peak for the snow area though, that one's my favourite area music!). It's nice to see someone caring about the music instead of just using the default ones RPGMaker has.
That's all! I hope you have fun developing this game in your free time, it looks promising