Technical design is very strong, I know the visuals and audio are from free assets, but you presented them very well, nice effects with the darkness and glowing shark eyes. I liked the contextual audio change when being chased by a shark as well.
I did find the insta-death to be a little unforgiving, as after spending a while collecting a bunch of divers, I had been hoping to restart at a checkpoint of the last diver I collected, so to go all the way back to the start was a little disheartening.
Also the bubble particle effect looked very nice, created a good refraction color effect. Overall very well made, but could use a little more content.