rearrange some vars and add a couple comments

scripts/AbilityPlayer.gd

@@ -6,15 +6,16 @@ enum TARGTYPES { SINGLE, CLEAVE, CHAIN, SWIPE, WAVE, AREA, RAY }
 enum PDMGTYPES { SLICE, PUNCTURE, BASH, HACK, SHRED }
 enum MDMGTYPES { BURN, FREEZE, SHOCK, POISON, LIFE, RADIANT, ARCANE, FORCE }
 
-var middleX
-var playerPos
-
 @export var attack_range := 0
 @export var attack_type := TARGTYPES.SINGLE
 @export var attack_damage := 200
 @export var attack_speed := 1.0
 
 
+var middleX
+var playerPos
+
+
 func _ready() -> void:
     middleX = get_viewport_rect().size.x/2
     

scripts/NPC.gd

@@ -1,3 +1,4 @@
+# base NPC class
 class_name NPC
 extends CharacterBody2D
 

scripts/NPCEnemy.gd

@@ -1,3 +1,4 @@
+# base NPCEnemy class
 class_name NPCEnemy
 extends NPC