So I played this for another hour today and I don't think I'm enjoying it anymore. I'm only about three hours in. I feel like I'm more save-scumming than playing, the enemies keep spawning and the challenges don't feel skill based. I wonder if I'm doing something wrong.

I can definitely see how it inspired many modern games, what with the 'woman over a radio telling you what to do while you walk in circles' approach.

EDIT: I guess it helps if I spend my upgrade points doesn't it. I mean, I knew to do that, but I didn't realize that the game would just expect me to backtrack to do it...