Decreased movement and shot delay of enemies based on number of enemies

remaining; increased tween speed of enemy bounce at 25% remaining.

player.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=18 format=3 uid="uid://pyuorpwb7lpe"]
+[gd_scene load_steps=20 format=3 uid="uid://pyuorpwb7lpe"]
 
 [ext_resource type="Script" uid="uid://dcrnf4r6c5qaw" path="res://player.gd" id="1_sweqy"]
 [ext_resource type="PackedScene" uid="uid://bwxxdrdvo3le0" path="res://bullet.tscn" id="2_1jxqw"]
@@ -73,6 +73,16 @@ animations = [{
 "speed": 10.0
 }]
 
+[sub_resource type="CanvasItemMaterial" id="CanvasItemMaterial_dw050"]
+particles_animation = true
+particles_anim_h_frames = 2
+particles_anim_v_frames = 1
+particles_anim_loop = false
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_b26j0"]
+particle_flag_disable_z = true
+gravity = Vector3(0, 98, 0)
+
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_op7ga"]
 size = Vector2(14, 14)
 
@@ -93,6 +103,20 @@ sprite_frames = SubResource("SpriteFrames_u1c27")
 animation = &"forward"
 autoplay = "forward"
 
+[node name="BoosterBurst" type="GPUParticles2D" parent="Ship/Boosters"]
+texture_repeat = 2
+material = SubResource("CanvasItemMaterial_dw050")
+amount = 10
+texture = ExtResource("3_1jxqw")
+lifetime = 0.75
+interp_to_end = 1.0
+preprocess = 1.83
+speed_scale = 15.69
+draw_order = 2
+trail_lifetime = 1.8499999999999999
+trail_sections = 2
+process_material = SubResource("ParticleProcessMaterial_b26j0")
+
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
 shape = SubResource("RectangleShape2D_op7ga")