Sadly, I have to agree with most of the other posts in this thread......I found this game to be extremely "buggy".
Characters falling through the ground.
Saucer getting stuck in buildings.
Situational bad camera angles.
Collectibles fused into buildings rendering them unattainable.
Characters becoming stuck on environmental elements.
.....and these were just some of the more annoying issues I had with the game. Ironically I still found the game to be enjoyable.