I might've avoided some frustration since I had a decent idea on what to level up and remembered how the game works for the most part. Didn't stop me from struggling with some of the early missions either way, and one mission with instakill moments was particularly annoying. Either way, it's an legitimately fun action game that from what I recall gets much better in co-op. The level select with multiple paths was also a nice little touch, but it's a real shame you can't revisit levels until after beating the game. I can imagine getting screwed over by making bad skill choices and being unable to level up further.