Add fire effect component to enemies and update game manager with initial coin count

objects/fire_fx.tscn

@@ -0,0 +1,33 @@
+[gd_scene load_steps=6 format=3 uid="uid://dx80ivlvuuew4"]
+
+[sub_resource type="Gradient" id="Gradient_5woy1"]
+offsets = PackedFloat32Array(0, 0.173759, 0.521277, 0.687943, 0.886525, 1)
+colors = PackedColorArray(0.635294, 0.188235, 0, 1, 0.890196, 0.317647, 0, 1, 1, 0.470588, 0.188235, 1, 1, 0.635294, 0, 1, 1, 0.858824, 0.635294, 1, 1, 1, 1, 1)
+
+[sub_resource type="GradientTexture1D" id="GradientTexture1D_mar4t"]
+gradient = SubResource("Gradient_5woy1")
+
+[sub_resource type="Curve" id="Curve_xeno3"]
+_data = [Vector2(0, 1), 0.0, 0.0, 0, 0, Vector2(1, 0.5), 0.0, 0.0, 0, 0]
+point_count = 2
+
+[sub_resource type="CurveTexture" id="CurveTexture_igm87"]
+curve = SubResource("Curve_xeno3")
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_dq33o"]
+lifetime_randomness = 0.25
+particle_flag_disable_z = true
+emission_shape = 1
+emission_sphere_radius = 8.0
+angle_min = -70.0
+angle_max = -40.0
+spread = 0.0
+gravity = Vector3(0, -100, 0)
+scale_curve = SubResource("CurveTexture_igm87")
+color_ramp = SubResource("GradientTexture1D_mar4t")
+
+[node name="FireFX" type="GPUParticles2D"]
+amount = 512
+process_material = SubResource("ParticleProcessMaterial_dq33o")
+lifetime = 0.5
+fixed_fps = 24