I think it's actually really rewarding once you get to 2nd level and are able to survive, then you upgrade quickly. Frustrating at first, but figuring out the loadout that works best for you and preparing for 2nd level was very satisfying!
What loadout was that for you?
Not 100% sure, but pretty sure Gravigun and Launcher, not sure about passives though. Seriously i NEED MORE =P
