I tried to make the difficulty curve smooth, but well, time pressures, lack of time to remake levels, etc made it tough to adjust levels for difficulty. Some of the later levels (I think level like, 12?) got an adjustment cause it was like, impossible, but that was the only major change other than quota and time tweaks.
A difficulty system was suggested by one of my teammates, but we didn't have the time to implement it.
Thanks for the feedback though! Glad you enjoyed despite it not being your cup of tea!