I enjoyed the design of the ship, and the atmosphere of exploration. The sound was also really immersive. Also, nice eel.
If I could ask for two things to add they would be:
a) more variety of decorations in the various rooms so that I could mentally map my surroundings more. I got really lost in level 1, and even after three deaths worth of exploration I didn't know if I'd only been driving in circles, or seen most of the level.
b) some way to see behind me or know that the eel was right behind me - I was killed twice by being eaten from behind, and at first thought I'd bumped into something but only after my first death did I realize no, that the monster must have eaten me.