i thought the difficulty wasnt too bad.. but there were a few parts where it felt a little unbalanced... the part where you had to platform jump up that tower in the ice stage...with the jetpack and when you landed you always had your back turned to the enemy...that part took me a bunch of tries.. then a couple parts here and there where i had i felt a little overwhelmed... but most of the time i had the right weapon...like the bolt gun in the junkyard made that level alot easier if you just used it the entire time and kept replenishing it