Not really much to say about the gameplay. Looks like you got quite a bit done with the week you had available. I want to leave feedback that's actually useful.
I ran into a bug that broke my game and made me have to quit. I was on the first floor and had reinforced it to protect against mines. I hit the last mine and while the floor was breaking, I was holding space bar to dig a hole I was on top of. As a result, my guy got stuck in the crouch position as if he was still digging even though there was no hole there anymore. I was unable to move or do anything at all as my guy ran out of oxygen and died.