First, it's not exclusively used by Buddhism, but also Hinduism and the cultures of Indonesia, India, Ancient Mesopotamia, and the surrounding areas.
Second, there is no visual difference between the religious swastika and that used by the Nazi party, aside from the Nazi swastika always being a part of the Nazi flag. They both "lean to the right".
Third, this games looks almost pretty, but it just seems like a fancy grinder. Grind grind grind, and when you're done, you make a new character for some more. Maybe they'll prove me wrong, but I have my doubts.