This was the result of trying to concatenate Stream<A> and Stream<B> into a new Stream<A> where B extends A.
@blinry The button was to run my game. 😢
So I figured I avoid all the hassle by using Stream<A> everywhere and casting into B where necessary.
This makes my clean code heart cry a little.
@winniehell Basically Java 8 telling you "Please do not push this button again!"