Good physics, but gets very frustating at some points
In the game you have a few levels in different planets and each planet has different characteristics, one is a mechanical world, the other ice, lava, and so on. The good thing is that you don't have to finish one planet to get to the other, Levels start to be open back and forth. You'll also have to play some levels more than once, since some areas of a certain level are only reachable after you buy upgrades, so that level that took you forever to go through will take forever plus a little bit more again.
In my opinion they tried to copy pixeljunk shooter concept, which is a great fluid physics game, and tried to change a bit. But really, some points are so frustrating, that I had to stop playing and come back to it later on.
As far as trophies goes, well, I gave up the 100% because I don't think I'll ever be able to do some of the things they require and I have other games to play :)