Progressing nicely! The colourful blocks are designations for what should be digged. The colours represent different blocks - green is a tile that needs a ladder after digging, red needs a ladder too, unless the corridor it is in is only one tile in height. The blue one (and yellow, which can't be seen here) is just normal wall to be digged. I colour-coded them because I want to ensure that the astronauts wont trap themselves too easily while digging. Kudos for HangedMan and Fartron for the suggestions on how to plan it out.
There's something rather annoying going on with the slope tiles which I have to figure out - if you command an unit somewhere, it may occasionally get stuck to the slopes, which is a result of the tricky stuff related to the shape of the slopes (they're basically half-tiles, and because the pathfinder is strictly tilebased... so yeah).
I should also test some buildings, to see if the astronauts (the brown ones are 'slaves', they are only for carrying stuff) can manage to prioritize it out and get all the necessary rescources from the stockpile.
There's lots of stuff to do, but it's coming up really well!