The author is taking everything out of the whole broken balance joke. It was a purposefully shitty game, so it had a ridiculous nameas well. Any weird things in the story can be explained by the game being so broken. But then again, it's a joke that will get old really fast. Fortunately for the author, this is isekai, so every single reader will automatically assume this is trash, so who cares if the joke has already got old.