Scoring, floor timer, and hud updates

- Move elevator panel logic out of HUD; HUD now listens for signals to update floor, saved, people, and score labels
- Add scaling rescue threshold that grows as you descend, with bonus points for exceeding it
- Add per-floor timer that triggers a losing when expired
- Add show_loss state on the screen for too-few-people and timeout failures

scenes/screen.gd

@@ -1,5 +1,5 @@
 extends Panel
-
+# my beautiful screen
 var sweep_speed := 150.0
 var sweep_direction := 1
 var sweep_x := 0.0
@@ -76,7 +76,14 @@ func show_win():
 	$SweepLine.visible = false
 	$TargetZone.visible = false
 	$AIFace.text = "ESCAPED"
-	flash(Color.GREEN)	
+	flash(Color.GREEN)
+
+func show_loss(message := "TOO FEW"):
+	is_hacked = false
+	$SweepLine.visible = false
+	$TargetZone.visible = false
+	$AIFace.text = message
+	flash(Color.RED)
 
 # target zones
 func attempt_hack() -> bool: