Quicktime events, as those are popularly called, can provide for a cinematic atmosphere, but severely limit replayability. They'll forever play out in exactly the same repetitious way.
Also can be immensely frustrating, because the only way to force tension into that mechanic is to make some of them depend on split-second timing and that makes it turn into a chore-like exercise in futility.
As for this game, I don't see how it's going to work against a single Alien. As a film, yes, that can work. As a game... Not so much. Not unless they structure the entire thing as one huge hide-and-seek thing, but I doubt it would have taken this long to programme if they were going to do something as simple as that.