I recommend downloading and playing, not playing in the browser for audio and smoothness sake.

So after watching "Title Pending" play my game I realized how crazy the controls go if you drive the submarine in certain ways. My recommendation for smooth sailing is to be gentle with the controls, try to keep the submarine fairly level, not rolling much, and try not to scrape into the ground, just go slowly. Also the vents will just spawn randomly and shouldn't be too far apart, they look like pointy cone shaped rocks with bubbles coming out of them, if in doubt just keep moving and you should come across some.

The oceans are becoming more and more polluted, you need to take things into your own hands.

Clean up the ocean while exploring in your sub. You only have a limited air supply but you can collect air bubbling up from the volcanic vents.

The oceans are infinitely procedurally generated and there is no requirement to collect all of the rubbish so just have a chill explore, don't run out of air, and make the ocean as clean as possible.

Controls- WASD or Arrow Keys - Forward/Back, Left/Right Q/E - Roll Shift / Ctrl - Pitch up/down

If you bump into something and your controls go a bit weird do some rolls and it should sort itself out.

Made using Godot, Blender, Audacity and Cakewalk.