Endless is the mode I enjoyed the most in an earlier version, but the score requirement doubling with every win is a bit much. Maybe a flat increase of, like... 80 points or so, instead of multiplying the previous requirement, would be better?
Would it be possible to also reintroduce the old endless mode, or something similar? Something truly endless rather than requiring exponentially higher points - likely to the point that, even with perfect luck with everything, it becomes completely impossible.