I love the feel of diving in to the unknown and audiowork is excellent that really pushes the atmosprehe even further. I can appreciate the "extra" stuff you made, like swimming underwater and fixing your ship, even though core experience would have been fine without them. However the ship is a bit wonky to control and I did ran into some game-breaking problems. I did get "stuck" to the rock in ~4500m, in a way that I could ride along it, but couldn't get further than 2m from it. Then on third run I think I hit edge of the map or something, because there was something blocking me from going down. Then I just quit and watched a playthrough from youtube. :)
Good job getting this out less than 2min before deadline! :D