Please excuse the lack of structure of this post and please take my comments lightly, I don't mean to be offensive in anyway.
Your Game.ini asks for RGSS104E.dll but you supply RGSS100J.dll, what's up with that? It didn't crash or anything, but it was a bit weird.
Character naming is broken, I get [][][][] as the default name
The opening has a giant repeating, stretched texture of a star or something.
I actually made it crash somehow, can't reproduce the crash.
I like how the windowskin changes depending on what kind of personality you select.
The animated cut-scene crashes the game for me after he casts the earth spell with "Graphics/Pictures/Urth was not found"
I threw in my own Urth.jpg image to continue past the second crash, saved the game and expected to be able to play but then more cut-scene happened! I just mashed the C key to skip it all as I really wasn't interested, the opening gave me the Pokemon impression so I expected it to be story-light only to be faced with quite a lot of text and a cut-scene that lasts a little long, I get control long enough to leave a room (Found the hidden switch straight away :grin: ) and then hit another cut-scene.
Your movement pathing is broken, if you mash the C key then the main character tends to walk off or stand still and shout across the map at whoever he is talking to, I also had no collision after you return to your burnt grandpa's house.
So the hero decides to become a Monstruct Master and more button-mashing text ensues.
I press shift and I get "Hey n[618]", did you miss a backslash there?
I stopped playing on my first random encounter because it crashed with an RGSS error, I didn't write it down, sorry.
I think for an early game it's a good attempt, however I feel that you should label this one as your practice project for learning the RMXP engine and move onto something else, I can see you've used a lot of unique features to get stuff to work, I didn't play through all 84 maps but from what I saw you had the right idea with mapping, but the details were lacking and your events are still a bit messy.
I would re-work the project and look at it from the perspective of what you want it to be, I felt a pokemon vibe from the very start with that introduction (And to be honest, a game called "Monstructs" I expected it), but it was being dragged along with a story.
Open-world, quick to begin would probably have suited that a bit more, and the RMXP engine by default can't achieve the ideas that you want to create.
Master the RPG Maker engine some more, study some game design rules and then re-approach with a good development strategy, make some posts in the General Game Making Discussion forum asking for how people tackle game design (Like how they introduce their games, how long until the player takes control, how much customisation of the player they allow, I know that you had gender, name and some personality traits), all the unique ideas you come up with are probably worth discussing first on this website before pursuing so then you can nail it perfectly.