Short stuff first
-I'll start by saying that I'm quite fond of the custom character art for the game. It has a very charming style
-The "credits" option on the title screen is missing an icon
-The UI sounds are a bit loud and grating. I would choose something a little less shrill
-The font is extremely hard to read. It could just be me, as I have poor vision in general.
-The door here is not aligned properly
-Name boxes are in the middle of the textbox, which looks a bit odd. I'd put it closer to the bust art
-I think this is a yanfly/visustella thing since I've seem it in other games, but sometimes I'm unable to use my keyboard to select a target in battle. The mouse works, but it can get a bit annoying.
-You can use skills in menus and waste SP
-I like hub areas, and I'm glad there's one in this game. Please keep it
-Unsure of the purpose of the row function
-Lower defense move only applies to one enemy, not all, as the description suggests
-Also not sure what the star bar is (more on the circle around the empty space in the middle later)
-All allies that join your party start at LVL 1. This grinds my gears and means they're useless for a while. I could see this being a bigger issue later on in the game. You don't have to have a fancy system to determine the average level of the party, just choose something that feels right
-Rock starts with a "charge LP" move, but no moves that use LP
Longer stuff
-The story and characters. I'll be honest and say that I started zoning out after a while in terms of the story. Lots of telling, almost no showing. I'm not sure how any of the information I was given really related to the world I saw or the characters outside of "I need to find my bros".
Characters were a bit bland. I didn't really like or dislike any of them. Valiant hero, tough friend, sweet female healer/mage, techy guy...IDK, I'm sure there's more development later on, that's just the vibes I was getting.
-The window size and maps are way too big. There's so much empty space. It's okay to have black bars on the side of your screen. I think I've yet to play a turn based RPG maker game that needed to be 16:9
-The gameplay was very flat, especially at the beginning. For a while, all you can do is spam "attack" or "more attack". Even when Rena joins your party, there's not much strategy. I like the idea of comboing elemental attacks, but they don't have any unique properties. I usually just chose a random element and hoped the enemy was weak to it.
-There's a lot of "anti-fun" mechanics. High miss rate, especially on those cloaked guys, insane encounter rate, low chance of escaping, enemies that have counterattack moves that also counter some character's magic for some reason...
Also, I really hope there's a reason that you can use items on enemies, because all it caused me was pain from accidentally healing enemies instead of allies.
-Progression might(?) be broken. After I found all the rabbits, I headed south to do whatever the fairy wanted, and found myself in a storehouse with a bunch of pirates. They seemed really strong, so I went north to try and get back to the forest, but I found myself on a beach with no way back.
I managed to beat the pirates there (lowered the game's difficulty), and made my way into the dungeon. I got to the one mermaid boss, but quit after getting demolished by the fishmen that use the counterattack move on every move you try and throw at them.
TL;DR, while most of my points are negative, I don't think it's complete garbage or utterly unsalvageable. I just think it might need a clearer gameplay direction and some work on the story and characters.