First off, I attached the master audio defines files, for you to make sure I didn't break anything. Every filename it points to uses the format Name_War, except for Suika, because the Suika mod music is named SuikaWar and SuikaPeace, so it will still be compatible. I've had some crashes lately, but am not sure if this is mod instability, or if adding so much to the audio defines scripts makes the game unstable.
Second off, I tried playing the Kappa civ, and sadly to say, I don't like them at all. Marshes are rarer than hills or desert or forest (the kind of features other civs focus on, basic or modded), the attack penalty in marsh makes no sense and just makes it harder to fight off invaders, and I don't like their UI -- it gives +3 Science, but nothing else, and marshes only have 1 food. So unlike, say, Utsuho Reiuji's mines, focusing on Nitori's research-boosting improvement doesn't trade growth for something else (production), it just hampers growth. And their UU just comes way, way, way too late.
Honestly... that's like, your opinion man.
It's not my fault if you don't like marshes, the UU is supposed to come late as a reward for focusing on science (and also because nuclear fusion is a recurrent topic in touhou), I didn't add food and more science to the UI because I thought it could be OP, guess it isn't. The attack penalty shows pacifism for the kappas, you'd think kappas would use their technological advantage rather than charging into the fray with sticks and stones, the fact that they live in the marsh upgrades defense as a sign that they know their territory and how to use it to their advantage, and the attack penalty shows their disgust for cqc conflicts and the fact that they could damage their own homes. Marshes aren't found everywhere, in touhou you hardly spot kappas outside the youkai mountain, also, if you can go around making rivers a viable feature, be my guest. And please stop comparing my mods to yours, you aren't some sort of expert modder whose work is vastly superior and I don't think my work has to be similar in the slightest to yours, we have different ways of modding, that's the way it is, I'm not going to adapt to your ways.