Aaaah sorry for the late response and thank you for loving the game (and welcome on the discord again, too !) (> w <)
I'm happy you liked the game and... yup, I'll try to answer some questions in the remake (most of them in bonus stories when you complete a route, if possible)~
But for Ryu, in fact, I deliberately left a big question mark about if he did it or not. There is a canon answer, but I also wanted to keep the players in the doubt because they can actually think whatever they want. If it's really annoying not to know though and that I have more complaints about it, I might consider being more clear about this situation in the remake x)
Thank you again for playing and enjoying the game (and the art styme as well)! (^ o^)/