Cyrillic is literally greek+glagolitic and it was partly a diplomatic creation of the Eastern Roman Empire(aka Byzantine Empire), in order to bring the slavs culturally closer to them.

Russians have nothing to do with it, other than them claiming they are the continuation of Eastern Roman Empire, something which is kinda laughable but whatever dont let your dreams be dreams.

Yeah, the lack of microtransactions and theme are its strong points. It even has some light story stuff.

But if you want to play a game of that style, you might be better off playing Star Rail(from the dev that made Genshin Impact), which is a f2p game with tons of microtransactions but you can really enjoy it without spending a dime. And Star Rail’s design and production values are unrivaled.

I havent played the game but from what i understand it seems like your typical mobile gacha game, where you collect characters and they autofight enemies. Except it isnt f2p and doesnt have any microtransactions. It is just a paid game, with all the trappings, design and progression of a f2p mobile game.