This was so polished! I love visual novels, especially Ace Attorney, so this was right up my alley and I've been looking forward to playing it.
I haven't played your other games yet but I will soon, because I really liked this one.
One little bug I found was that I was able to progress to the end without speaking to Carlos (the blood sample just appeared in my inventory along with the love letters), but Liam and Jake still talked to each other as if they had met him.
The writing was so good, as well as the art!
You asked Kumachan if the overworld map should be smaller, personally I would actually agree with you on that because I was a little lost. But that's very subjective.
The minigames were adorable. They were gimmicky but in a charming way, like in Danganronpa and pretty much most Visual Novels on DS! :D
It really contributed to the personality of this game and it's wonderful to see something like this done in SGB. I think this could not only be on the level of other games in this genre, but even set new standards.