I thought this new mode might fit the game well for people who just want to type in peace without the pressure. It's basically an endless mode without a losing condition, so it's truly endless. To end this mode you have to quit through the pause menu which I've noticed no one probably used. Since there was a quite big problem with it and no one told me about it..
That should be fixed too now. Hope at least some people will enjoy this new mode. Have fun!