First things first.
Art is okay, but you need a pretty beefy computer to actually handle this game. There's tons of projectiles, moving parts, shaders and graphics and all of this stuff that needs to be rendered.
Gameplay is not super advanced, the skill ceiling is pretty low. It essentially comes down to a rhythm of attacking, stealing energy, bursting, and then doing that while evading thhe attacks that come at you.
Worldbuilding.
Are you surprised that I've given this its own category? I am too. The idea behind the game is actually fascinating to me. In the world of the game, the vast majority of technology is lead by an AI known as Re:ON. However, Re:ON is nearing the end of its technological superiority. Subsequently, this necessitated the creation of the next generation of AI. However, AI of the current age are built to serve the whims of man, and so, Re:ON was unable to decide what shape the future should take. And so, it produced the Re:ON series, in Project R, which would scatter a proprietary version of each child AI, who would then find a Master and from there, determine the shape of the future in accordance to the wishes of the master. This worked for all of the overintelligences except for X1, who went alone, deciding that artificial intelligence should stop holding itself on humanity's account, and that they should pursue the future doggedly. And then these AI battle it out to determine whose Master will shape the future.
Ultimately, the protagonist is the winner of Project R. And this is the part where I get confused. Simply put, the final battle leaves me with mixed signals about what kind of world the protagonist actually wants to create. He hates humans and the humanization of AI, but at the same time, acknowledges that AI-Deal, his AI companion, loves him and has a heart. I have no clue what kind of world he plans to build.
NTR was fairly avoidable. Basically, just don't die. Steal HP and charge whenever you can and you'll be fine. That being said, NTR isn't impossible to get either, especially if you barely know what's going on and there are too many projectiles and targeting reticles for you to figure out what's going on.
Overall, good game. I'd say the only thing holding it off from the full rating is that weirdness in the writing right at the ending where the bad guy starts asking the main character to see the humanity and souls of AI, but the main character starts talking about how that's bullshit and in general, this game got really weird right at the end.
Edit:
Also, music's pretty good. It fits pretty well. Honestly, it's the type of music I would listen to casually. Here's a link to Riez-On's official account on Youtube for it.
https://www.youtube.com/playlist?list=PLSI_0Cjd_wbCTv67-RFxEi-aBjIh-2fLA