added support for obstacles to levels again

Enemies/BabyEyeDog/baby_eye_dog.tres

@@ -15,17 +15,7 @@ scene = ExtResource("3_otbdk")
 death_sprite = ExtResource("1_yj87d")
 sprite = ExtResource("2_mkbm6")
 spawn_power = 16
-health = 70
+health = 15
 penalty = 4
 movement_speed = 3.5
 spawn_cooldown = 0.6
-common_group = 5
-common_cost = 2
-uncommon_group = 11
-uncommon_cost = 2
-rare_group = 16
-rare_cost = 4
-epic_group = 23
-epic_cost = 6
-legendary_group = 30
-legendary_cost = 10

Enemies/ElderEyeDog/elder_eye_dog.tres

@@ -15,16 +15,7 @@ scene = ExtResource("3_m808b")
 death_sprite = ExtResource("1_qveaa")
 sprite = ExtResource("2_7nc4x")
 spawn_power = 14
-health = 350
+health = 150
 penalty = 15
-movement_speed = 1.1
+movement_speed = 1.4
 spawn_cooldown = 2.0
-common_group = 2
-uncommon_group = 5
-uncommon_cost = 2
-rare_group = 8
-rare_cost = 3
-epic_group = 14
-epic_cost = 4
-legendary_group = 18
-legendary_cost = 5

Enemies/EyeDog/eye_dog.tres

@@ -20,6 +20,6 @@ icon = ExtResource("2_tyyee")
 scene = ExtResource("3_mxg1o")
 death_sprite = ExtResource("1_r8gpy")
 sprite = SubResource("AtlasTexture_n6kdu")
-health = 180
-movement_speed = 1.5
+health = 60
+movement_speed = 1.6
 spawn_cooldown = 1.2