Thanks for the comment! Colorblind mode is a great idea, we’ll add a unique symbol for each route. You’re spot on with the stamp balance issues, we'll be tweaking the balance as we add new mechanics/upgrades. Currently in the story mode, overweight packages are only possible after day 3, and even then it’s a low chance(10% per package) that one will spawn. We’ll be reworking how that works in a future update – we’ll likely move the large stamps into a stamp pack upgrade, and increase the number of small stamps into the starter pack.