I played this game for 2 hours, and I had alot of fun with it. Basically you are in a small submarine and given 7 coordinates, (with X, Y, and Depth markers), and you must investigate these 7 spots in order to rescue people lost in the depths.

+ I noticed that some reviewers were complaining the game needs a save function, it does not! You do not need to do all the 7 markers in one run! A few are insta death! Once you find out the ones you need to complete just do those. A perfect playthrough will take less than 10 minutes if you go straight to the right locations. Process of elimination.
+ Finding the coordinates seems tough at first but after about 20 minutes you will figure out how to direct your sub properly to the locations to get there faster. Also remember there is a Booster Switch to temporarily go faster at the front of the sub.
+ 95% of the game you are stuck inside the small submarine doing nothing but driving to the next location, if you get bored easily this game isn't for you. However for people that love these little atmospheric relaxing claustrophobic games, (like me), you will like it.
+ The noises on the headphones were creepy, creaking metal, whale noises, haunting and atmospheric.

- One thing that was super annoying was the Tab button to bring up the coordinates. The in game paper sheet covered the view for the booster button and the button to turn the engine on. This was annoying to keep pushing the Tab button on and off to see everything. It would be nice to see both at the same time on the screen for more comfortable control of the sub.
- There could be more locations for a longer experience, and the locations could be more eventful in general.

If you have lots of patience and enjoy these type of submarine games, you will probably enjoy it.
The asking price is a bit high for what you get, try to wait for a sale.

Overall rating: 7.5 / 10