Definitely more engaging once you get into it and figure out what you're doing. I ended up spending about 20 minutes on the first mission and an average of about 3-4 on all the others, lol.
The mini-games for unlocking files are a neat way to diversify the gameplay, but I feel like the game could definitely use some more unforeseen hang-ups or alerts that you need to avoid along the way. Jumping between the different windows on the UI is clever and interesting at first, but can get a bit tedious when I'm really just trying to jump up to a corner to close the window and such so throwing hazards or enemy AI at me while I'm in the middle of the task would keep me more on-edge and give more of the feeling of being a hacker doing espionage things.