Very cool and polished entry! I didn't manage to get back safely to the surface, so I can't comment on the full experience 😄
I really like the mood and sound design. It truly immerses me beneath the water's surface. The anglerfish enemy is amazing and creates great tension in the levels.
I often found myself waiting for the floodlight to come back online. Maybe you could add a small hint about where the other enemies are, so there's at least a chance to move without light.
Backtracking all the way to the surface wasn't very engaging since you’ve already overcome all the challenges. Maybe the game could just end underwater, where you find a portal to the surface? 😄