Very good stuff. Cool gameplay, good challange and overal nice area design.
However, the captain was never really that much of a threat (unless you are bad at math) and therefore not as scary. The stress factor from the limited time in the tubes made this whole thing a lot scarier. I wish there was just a bit more done with the environment and the characters.
But overall, very good. Even the addition of an endless mode gives this a replayability factor.
(Video note: I'm german, so excuse the rough speaking lol)