Thank you so much for playing the game. This is really detailed and high-quality feedback!
I put a lot of my personal taste into Saja's character, so I'm really happy you liked him. I had no idea while making it, but it's funny how the game ended up with such a ace attorney vibe lol. I think it's probably because I love that detective game series just as much as Return of the Obra Dinn, so it must have influenced me a lot.
I really relate to all the feedback you've given. I'm seriously considering whether to officially release this game later, and if that happens, I'll try my best to incorporate your suggestions.
I want to keep the Korean names for the characters, so I'm thinking about changing them to names that are more familiar or easier to remember for English-speaking users (for example: Yuna, Eugene, Jay).
As for the wave mini-game, I deeply agree with you, and I've received similar feedback from other users as well. I'm considering making it more puzzle-like and fun, and improving it so that once you match a puzzle correctly, you don't have to do it again.
Once again, thank you so much for your helpful input!