It's a REALLY good and addictive game.
I love the visual style of it and it really emphasizes well of the underwater claustrophobic feel to view the sub like you're viewing it through a tiny looking glass on the side of a submersible.
The soudscape also give quite a good vibe of actually diving deep and the constant pinging gives the urgency to check your near surroundings with focus for not to bump on any accidental mine approaches.
VERY well made game especially for just 3 days time <3