New hefty patch:

• Gorilla Arms YEET should no longer fail to YEET if the runner is buried deep in ore.
  (The solution to this was a bit funky, as the way I have Box2D physics set up I couldn't find an easy way to simply disable collisions for a second and then enable them back, so instead what I do now is delete the ore object upon YEETing, create a temporary "ghost" object that is using non-physics movement, which lasts for 250 milliseconds and is then destroyed, handing off its data to a newly created physics ore object. With some difficulties I made this look rather seamless, and this way the ore will not collide with the ore pile above the dwarf, unless the pile is really gigantic but that is related to other design issues that still need to be solved.)
• Artifacts and Prestige upgrades that give you bonus dwarves no longer count towards the Underground Housing cost coefficient.
• Underground Housing cost now scales based on the number of times it has been bought and not based on each dwarf like it did before. The coefficient had to be adjusted, which makes the cost curve different, so it must still be tested to see how it plays out. Please report if you have any observations regarding the new balance.,
• Added a few buffs and upgrade tiers to a couple of turret, laser and runner protection related upgrades to give runners a slightly better chance of surviving late game. This is just a tiny hot fix, but there's tons of other stuff to do regarding this, such as also adding new protection and retrieval units. "Balancing" the endless mode will be a difficult and iterative task.,
• The Triple Seal Gate event now happens at lvl 49, and if keys exist in the room but your runners haven't yet collected them, they still count as if they did for the purposes of the gate.,
• Other tweaks and bug fixes.

Next I'll be working on runner's safety in the late game, adding another collector unit, visual and GUI issues, and many other things based on everyone's feedback.