added objective, added boss

Levels/Objects/TreasureChest.tscn

@@ -0,0 +1,36 @@
+[gd_scene load_steps=6 format=2]
+
+[ext_resource path="res://Sprites/Assets/treasureChestOpen.png" type="Texture" id=1]
+[ext_resource path="res://Sprites/Assets/treasureChest.png" type="Texture" id=2]
+[ext_resource path="res://Levels/Objects/Gem.tscn" type="PackedScene" id=3]
+[ext_resource path="res://Levels/Objects/TreasureChest.gd" type="Script" id=4]
+
+[sub_resource type="RectangleShape2D" id=1]
+extents = Vector2( 21.3333, 17.3333 )
+
+[node name="TreasureChest" type="Sprite" groups=["enemies"]]
+script = ExtResource( 4 )
+
+[node name="chestOpened" type="Sprite" parent="."]
+visible = false
+texture = ExtResource( 1 )
+
+[node name="chestClosed" type="Sprite" parent="."]
+texture = ExtResource( 2 )
+
+[node name="Gem" parent="." instance=ExtResource( 3 )]
+visible = false
+
+[node name="Player Detector" type="Area2D" parent="."]
+collision_layer = 0
+collision_mask = 2
+input_pickable = false
+monitorable = false
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Player Detector"]
+visible = false
+position = Vector2( 1, -1 )
+scale = Vector2( 1.5, 1.5 )
+shape = SubResource( 1 )
+
+[connection signal="area_entered" from="Player Detector" to="." method="_on_Player_Detector_area_entered"]