Everything here seemed to work as intended. The collisions were clean and the sub worked nicely. After a while exploring started to feel more like a chore than actually fun. The controls felt sluggish but I guess that is what you would expect from a sub. I think in this kind of game with such slow controls it would be better to have a wider view. Focusing so much screen space to the sub was a bit of a waste as it would be better to see more environment. It felt like there was not much to do other than drift about. After a few minutes the sonar sound all on it's own started to feel hypnotic and not in a good way. When it came time to stop it was a relief.