I think... I ran into a bug? Suddenly my resources started shooting up like crazy. Not sure how I triggered it.
Anyways! I think just a little bit of time for someone to get used to the UI before the timer starts counting down could be useful as it did take me a while to figure out that you could switch between characters and give them unique weapons.
I also kind of wished that the weapons had more unique requirements, as you don't really have to alter your strategy very much to max out each weapon (assuming you don't run into the infinite resource bug)