I was digging in the abandoned ruins just outside the starting location.  When I dig I typically dig in a circular fashion and slowly make my way down so I'm not trapped under a ceiling of rock by tunneling too deep.  Yesterday, I hit the bottom of the map and then all of the rock disappeared completely leaving me with only the exposed relics, power stones, old parts, etc., visible.  And yes, I was able to fly around and collect these.   I've attached a picture below for your review:

We did something that should have fixed this issue for the next build. So we'll see what happens then. :)

Ah, how do I update my game via itch.io?  Seems only Alpha 2.1 version available here, and experienced this very issue today... unfortunately. -.-

Thank you.  I've pleged on the kickstarter extension ($30 tier), so now I wait for a steam key to arrive within 3days.  Is that correct? =}