Sounds good to me; I could see the anomaly being just the alien so periodically an alarm sounds on the ship and the alien is like pink tentacles at first, then tentacles and a gnashing mouth of teeth, and third time stays out until the match ends so it's really deadly at that point if anyone goes anywhere near that side of the level. It'd be even cooler if it was randomly different threats but picturing keeping it somewhat predictable like the submarine or lab.