Allow configuring the number of days

ui/Hud.gd

@@ -3,6 +3,9 @@ extends Node2D
 var coin = 0
 export var postie_times = [0.5]
 
+# Anything above 10 can't be rendered (for now?)
+export var num_days = 5
+
 func add_coin(amount: int):
 	coin += amount
 	$HudInner/Panel/LabelCoin.text = str(coin)
@@ -11,3 +14,4 @@ func add_coin(amount: int):
 func _ready():
 	var sch = $HudInner/Panel/Scheduler
 	sch.postie_times = postie_times
+	sch.days_on_this_level = num_days