Fix collider and add waves

EnemySpawner.gd

@@ -0,0 +1,44 @@
+extends Node
+
+var Enemy = preload("res://Enemy.tscn")
+
+var wave = 0;
+var enemyList = []
+var spawnpoints = [[20, 80], [50, 120],[90, 170],[500, 50]]
+
+func _ready():
+	nextWave()
+	pass # Replace with function body.
+
+func _process(delta):
+	var i = 0
+	for enemy in enemyList:
+		if not enemy || enemy.get_meta("dead") == true:
+			enemyList.remove_at(i)
+		i = i + 1;
+	
+	if len(enemyList) == 0:
+		nextWave()
+
+func spawnEnemies(count):
+	var i = 0;
+	while i < count:
+		print("spawn enemy")
+		var enemyInstance = Enemy.instantiate()
+		enemyInstance.name = "Enemy" + str(randf())
+		enemyInstance.position = Vector2(spawnpoints.pick_random()[0] + i, spawnpoints.pick_random()[1] + i)
+		get_parent().call_deferred("add_child", enemyInstance)
+		enemyList.append(enemyInstance)
+		i = i+1;
+	
+func startWave():
+	print("start wave")
+	if wave == 0:
+		spawnEnemies(1)
+	else:
+		spawnEnemies(wave * 3)
+
+
+func nextWave():
+	wave = wave+1;
+	startWave()