added green attack, enemy

scenes/green_explosion.tscn

@@ -0,0 +1,30 @@
+[gd_scene format=3 uid="uid://dqu37r80dlxao"]
+
+[ext_resource type="Texture2D" uid="uid://d1ybbm5tk1tbd" path="res://assets/vfx/particle_star.png" id="1_rocpj"]
+
+[sub_resource type="Curve" id="Curve_mb78c"]
+_data = [Vector2(0, 1), 0.0, 0.0, 0, 0, Vector2(1, 1), 0.0, 0.0, 0, 0]
+point_count = 2
+
+[sub_resource type="Gradient" id="Gradient_68us8"]
+offsets = PackedFloat32Array(0, 0.61440676, 1)
+colors = PackedColorArray(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0)
+
+[node name="GreenExplosion" type="CPUParticles2D" unique_id=490180742]
+emitting = false
+amount = 120
+texture = ExtResource("1_rocpj")
+one_shot = true
+explosiveness = 1.0
+spread = 180.0
+gravity = Vector2(0, -100)
+initial_velocity_max = 86.95
+damping_min = 100.0
+damping_max = 100.0
+damping_curve = SubResource("Curve_mb78c")
+angle_min = -386.1
+angle_max = 427.8
+scale_amount_min = 2.0
+scale_amount_max = 4.0
+color = Color(0.6155507, 1, 0.45411357, 1)
+color_ramp = SubResource("Gradient_68us8")