moved enemy direction control and y axis to game controller, converted enemies to be staticBodies and made many of them

scripts/enemy.gd

@@ -1,12 +1,19 @@
-class_name Enemy extends RigidBody2D
+class_name Enemy extends StaticBody2D
+# used StaticBody to get around gravity, probably a better way
 
-# there is probably a better built-in to use here
+# there is probably a better built-in to use here, maybe not for static body
 @export var direction:int = 1
 const SPEED = 1
+var drop = false
 
 func _ready():
-	pass # Replace with function body.
+	pass
+
+func go_down():
+	drop = true
 
 func _process(_delta):
-	var x = get_transform().get_origin().x
 	move_local_x(SPEED * direction)
+	if drop:
+		move_local_y(SPEED * 5)
+		drop = false

scripts/game-controller.gd

@@ -11,13 +11,15 @@ func _process(_delta):
 	# detect when one enemy goes too far
 	var change_dir = false
 	for child in game_node.get_children():
-		if child is RigidBody2D:
+		if child is Enemy:
 			var x = child.transform.get_origin().x
-			if x < 0 or x > 300: # not using collision detection properly
+			if x < 0 or x > 600: # not using collision detection properly
 				change_dir = true
 				break
+	
 	# change directions of all enemies
 	if change_dir:
 		for child in game_node.get_children():
-			if child is RigidBody2D:
-				child.mydirection *= -1
+			if child is Enemy:
+				child.direction *= -1
+				child.go_down()