i collected together heaps of heat, minerals, materials and crowns but i didn't want to go to the next level and waste 10 energy so i figured it would be alright if i just clicked go to haven.. but i missed out on all my stuff! (or at least my minerals and heat)
maybe there should be a button you can click after each level that gives you the choice to either continue or just leave?
There are floors every once in a while that give you the choice of going deeper, or going back to town.
If you could cut and run at any time that would make some challenges kind of pointless. I think the current intent is heat and minerals are a reward for reaching the end alive.