Here's my feedback on the game:
- The art is great, especially the fading in of objects in the distance.
- Nice music that changes over time.
- The gameplay is quite limited; mainly just move up and down.
- The submarine can go offscreen (x and y are not clamped).
- There is no option to invert the y-axis (normally inverted in plane simulators).
- The button in the main menu doesn't also function as a quit button.