Why we can't have nice things (rot13 spoiler: vg'f evpu crbcyr)
Beautiful scenery, from the colors to the models, really loved it.
Physics are a bit iffy.
The story was nice, too, even though I'm skeptical of such "us vs. them" kind of argument, especially when it comes to environmental issues (though of course not entirely devoid of merit).
The big problem I had with it is the hugely repetitive gameplay, bordering on the disrespectful. You do the exact same loop 5 or 6 times with almost nothing in-between (3 or 4 lines of dialogue).