Chris, really glad you're enjoying it.
It means a lot to me.
There is currently no reason to go any deeper into caves.
you have most likely seen everything there is at the moment.
Seeing as how people enjoy the deep dives, I may put something there later
According to the original design specs of the game , you can only save in space. Honestly, I never envisioned such deep cave dives... I really don't think that will change, but I do understand your concern.
New content is coming soon...