A nice mission! Exploring took me longer than expected, especially finding those safe deposit boxes, even though I have to admit the clues were there the whole time. I enjoyed the overall theme - Four Flags seems to be way more fun than Six Flags. And just today, what's the chance, I was thinking that it would be nice to have occasional more modern music in TDM missions, just as a throwback to a couple tracks from the original games, so I was very pleasantly surprised.
What I disliked was mostly already said: some parts of the building seemed a bit too empty of people and because the NPCs also seemed to be super attentive, the contrast between how careful I had to be on the ground floor and in the rest of the building seemed a bit strange.
And the first cutscene was just way too silly for me. I don't think this method worked well together with the stuttering fps, low visual quality of the models and artifacts of the engine like the lady's shadow seemingly being bald. It reminded me of this cinematic masterpiece where somebody remade the whole of Titanic in The Sims 2. The playable scene after that was hilarious though.