Alpha build 3

Updated with today’s fixes and additions:

• Save files should actually be working now (though I’m still testing for edge cases)
• The final boss doesn’t have an instant nuke anymore
• Headshots on shamblers have a special effect now (which is a little janky still but will be adjusted soon)
• Expenses are now properly tracked for budget negotiation
• You shouldn’t be able to click through the exploration menu to the store buttons now
• The base maintenance menu actually works
  • It helps if I actually plug it in
• Rushers should now be able to actually hit your defenses (they learned to be less standoffish)
• The save prompt in the pause menu now fills in the entry field when you click an existing save
  • Again, it helps when I plug things in