I wasn't quite sure what the mine should look like. I assumed they were round spheres and linked to the colours in the other part of the sub?
Still I never saw one. I tried top to bottom depth wise.
Are they big?
At one point I heard a sound (that wasn't the sonar) but nothing appeared in the room with the coloured balls. The dot on the sonar had gone so I assumed I had captured it.
The speed of the sub was difficult to control. I could never get it to stop in order to just try different depths.