So far I'm absolutely LOVING the game. Your redesigns of the main cast are genuinely phenomenal, there's not a single design I dislike, even amongst all the side characters, you have a super good eye for design.
Tbch it's extremely disheartening that you seem to feel like your English/writing skills are lacking. English IS my primary (and only x'd) language, and I used to enter writing competitions growing up, winning top 3 in the state of Utah twice; I can very confidently say your writing is genuinely better than almost all of my closest friends. When you're writing the fun character interactions and gags it really shines. I pray you take my words at face value and worry less about your competency in that regard <3
Sadly I was unable to finish Day 2, as another comment brought up, I also was unable to finish the conversation interaction with Biggs, leading to a softlock in progression. I did do every day including 0, so I don't believe it's an issue stemming from skipping Day 0, but I'm not sure what. If it's any help I visited him last, so there could be some sort of check that's not happening to progress?
My biggest critique by far is that while I can tell your creative vision for the game is incredible, and the actual base setup and mechanics you have is extremely solid and engaging; it feels like you're setting yourself up to fail your expectations if you're completely building the game by yourself. Character creation is great, dialogue mechanics (excited to see expansions on rapport especially) are super intriguing, combat is a bit overwhelming? But I'm also just kind of stupid when it comes to turn based games in general LOL. UI is very pleasant and unique, and the overworld placeholders are nice even just as they are for now. But with all the complexity of the ever expanding ideas for conversation, the genuinely impressive expansive list of characters, the lore and world building, the "deadline" based setup with Dragonheart presumably being where character endings will be, the big list of locations, and the fact that there's presumably going to be a heavily expanded combat system with leveling, stats, items, unique party mechanics, and the fact that all of that is going to be developed on a super unique lane/positioning based combat system, I'm genuinely impressed if you're not completely overwhelmed with the scale of what you seem to be setting up.
In my very humble opinion as someone who's never developed a game or worked on many creative projects in general, I feel it will be incredibly creatively draining for you to try and finish up everything you want to do every day, as with a game like this each following day will only be more complex than the last with more player choice and branching choices presumably coming into play. You are extremely talented as an artist, author, and general creative visionary with the rest of the game elements so I have no doubts if you keep the passion alive into the future you can get most of the things you've set up and want out. But I do think I can speak for everyone that's playtested, it's extremely ok to skip out on specific elements and just lay out the skeleton of most days, focusing primarily on the story progression and romanceable paths. Not to say I don't think the combat, quests, interactable environments/scenes, or gifting systems aren't important, as I do think they do a fantastic job of immediately making this game stand out from any "generic" visual novel, but I think coming up with those scenes in a way that feels natural and fun would be easier if the story/scenes they lead into are already planned and implemented.
Tldr; I've loved your art for well over a year or two, and I'm over the moon you're still working and making progress on this game. You're unbelievably talented, yet I worry you're letting yourself get trapped in a perfectionistic headspace and trying to get all your ideas out at once, and as development continues you might find yourself too ensnared to progress. But of course, I'm just a 21 yr old on the internet with no game design experience or higher education, and you know your limits and headspace far better than I, so take anything I've said with a grain of salt. Sorry this message turned out so long, I hope it's not a bother to read through it all ;c; Please continue your great work!!! I should be financially stable around halfway into next month, so if there's anywhere I can donate to support you let me know :')
(Also please please please tell me Biggs is potentially on the romance list in the future I love his design so much he's literally so cute please)