Undersea Robotic Sub Game!

So, after pondering, and scaling back my graphics ambitions, and twiddling in inkscape, I decided to make a game about controlling an undersea robotic submarine, exploring the wall of a giant underwater trench and collecting samples. Yay! Science Game! The challenge will be that the more valuable samples will be deeper, and perhaps in caves, but deep down and in caves, it becomes darker, and control lag increases! Can you get the critical samples you need without losing control of your submarine? This is your mission!