Disappointingly linear
All the puzzles are disappointing. You simply keep moving, and the puzzles solve themselves (Solving a puzzle consists basically of clicking a switch. Sometimes a couple of them).
Boss fights were disappointing too. There were a couple that caught my attention. They were not great by any means, but they are at least better than all the other mediocre bosses in the game.
Riding vehicles seemed fun at first, but quicky became boring. You still have to do the exact same thing, only you are moving slightly slower, and your movement is a little bit restricted.
The story is just meh, except for one really interesting plot twist near the middle of the game. Other than that, the story is basically people just asking you to do things (build a bridge, activate some system, restore power... bla bla bla). Each one of those is done in exactly the same way... kill a couple of enemies and click a switch.
The thing that makes this game stand out though is the graphics. It has the most beautiful graphics I have ever seen in a game. Unfortunately, graphics alone is not enough to create a great game, or even a good one.
Sound is pretty impressive too. When a rocket explodes near you, you lose the ability to hear for a while. That was a nice touch.
Bottom line is, this game has the same gameplay as the games from the mid 90's. It just doesn't deliver today.