Really neat! First off, as someone whose made something with RPG Maker before I have to say you did a fantastic job with the engine. Usually most RPG Maker games have a certain look to them but yours looks entirely different and I only knew you used it because of the metadata. It gives your game a very original aesthetic that frankly reminds me of a more retro-like persona.
I ended up playing for a lot longer than I originally expected to as well. The setting is very compelling and I love how you wove the tutorial into the intro. The concept of trying to aim for having your EP in the center is also a refreshing way to break up the typical style of trpg mana/resources. The music fits the rest of the game's atmosphere pretty well too.
The only real feedback I would have is that I felt a bit lost at times. In the first room (cafeteria) I wasn't really sure where to go at first and ended up going the wrong way before working my way back to the left side. I really appreciated the green arrows over doors but I never noticed one in that room and that didn't help when the door was off screen either. But maybe that just forces exploration more so that could make it okay. Otherwise I didn't have any issues with it and had a lot of fun. Nicely done!