First of all, I loved the concept and the use of sound and lighting, it gives the impression of the sea depths without a doubt. On the other hand, I found it very empty at the beginning and I had technical problems in Firefox, the game was running at very few frames. I see that you have done a great job in the game that at first glance cannot be seen, but that has a lot of merit. Congratulations!

Nice idea with the controls! The light cone should be a tad larger. I encountered only 1 enemy in 5 minutes, moving further down I heard an ominous sound but then my sub got stuck. The art is nice, but the ping sound really is distracting after a while :)

If you reduce that the game would feel quite serene.

I love the theme, but technical part is poor, if I'm being honest. 

But i love control scheme, where you control your ballast level in order to ascend or submerge

I really liked the movement mechanics, and the tension the sound built really added to the atmosphere. However after a bit I realized that there wasn’t a whole lot threatening me other than the walls. Otherwise a really solid concept.