Visually, the game is very good. Unfortunately, I couldn't make the controls work consistently enough for me to make it very far.
To make restarting more accessible, please consider making the buttons an overlay like the help screen so that they can be clicked from anywhere. By default, when I open the game, the New Dive and restart buttons are cut off.
When you get the chance, please try out my own game and let me know what you thought of it. Thanks!