Thanks a lot! I'm sure the balance could be tweaked with more time, but I hope the sense of everything scaling up comes across, and gives that satisfaction of "make number go up!"
I really tried to ensure that you almost always had something to unlock or purchase after each round, and that just when it started to slow down, and you need 2-3 rounds to save up for the next thing, you manage to get another 2x currency and open up a new level of earning potential.
Glad you enjoyed playing, & thanks for taking the time!