Great visuals and audio, it really helps set a good mood. The diving theme is great and I think You have a lot of really neat mechanics that serve that idea very well. Most suggestions I would make were covered in Deylz comment except that I think the movement was fine, the flashlight and player turn should be a bit quicker for how fast the abys creatures are, and more visual indications are needed in the abys to help the player get a sense that they are moving. Of course, I get a lot of those are just things that result naturally from the time constraint aspect of the challenge so it's just a suggestion since I'd really like to see more of this. Great Job!