Pros:

Fish
Nice lighting
Good poster
Very simple, yet very fun
Two places with supplies
Challenging
Good use of ambient sounds
Gnome with diving equipment

Cons:

A little too small
Could have had some hint of where to start
Needs a small update

Conclusion:

I really liked playing this map, and I think I wasn't the only one going around shooting fish before starting :D . The gnome, was that an easter egg or something? Either way it was a nice touch. I really hope you release a updated version of this map, perhaps bigger? Maybe with an outdoor area?

I played it with my little brother who loved to just watch the fish in their tanks, we will be playing the new version if you ever release it!