Yo-nas!
Thanks for the elaborate answer including the video of the gameplay. Color me impressed! Thank you also for the input and the feedback!
The size of the numbers doesn't equate to difficulty if you think about it. There are easier and harder numbers indeed but they get (hopefully) scattered throughout the gameplay evenly. Ranging the expected goal progressively would hurt the intended loop.
Maybe you'll figure out the range! ;)
Good luck and thank you for your time!