[Some Spoiler]
I like the music choices (it fits), the art styles, the emotion, the scenes, it's all beautiful. The dialogues are also natural but there are these moments where it's not very natural.
For example, when Arata gets "kidnapped" and trapped in the backroom with Hikaru, he doesn't look distressed and like "What the heck just happened and why am I here??", instead, he just acts like "Oh, I'm here, oh hello Hikaru, wanna explore?"
Also, I was surprised that this game has a controllable character moment since I had never played VNs with a playable character before (though I was a bit disappointed when I could only move horizontally lol). The puzzles are relatively easy enough for non-puzzle solver people to complete the game.
My problem is that, after I got both ending 2 and 3 I tried to make a new game. So I spedrun the dialogues and when I got into the rainbow chair puzzle, Hikaru said "Hey, are you cheating?". I did not "cheat" and I already know the answers, it's not randomized. Maybe it would be better if Hikaru said "Wait, have you experienced this before?" or something like that, trying to explain "ending 2: loop?", idk though, it's not my game.
Oh yeah, just want to note that after I got caught "Cheating" by Hikaru, my game went black screen. Is this supposed to happen?
In short, cool game, would definitely play more to get all the endings!