Use const for preload

src/scripts/enemies/bookworm.gd

@@ -19,7 +19,8 @@ var attack_target := Vector2(0, 0)
 @onready var shape: CollisionShape2D = $PhysicsCollider
 @onready var anim: AnimationPlayer = $AnimationPlayer
 @onready var map: TileMap = get_parent().find_child('Map')
-@onready var Spear = preload("res://scenes/projectiles/spearlike.tscn")
+
+const Spear = preload("res://scenes/projectiles/spearlike.tscn")
 
 func _ready() -> void:
 	super._ready()

src/scripts/pentagram.gd

@@ -7,7 +7,7 @@ const CLIP_ANGLE := 0.5
 @onready var image: TextureRect = $Pentagram
 @onready var multiline: Line2D = $Multiline
 
-@onready var clip_effect = preload("res://scenes/clip_particles_effect.tscn")
+const clip_effect = preload("res://scenes/clip_particles_effect.tscn")
 
 const PENTAGRAM_CORNERS: Array[Vector2] = [
 	Vector2(0.5, 0.885),

src/scripts/sfx_audio.gd

@@ -12,7 +12,7 @@ enum Sound {
 	PUSH_BACK
 }
 
-var SoundDict = {
+const SoundDict = {
 	Sound.CHEST: preload("res://assets/sfx/chest.mp3"),
 	Sound.DRAW: preload("res://assets/sfx/draw.mp3"),
 	Sound.DRAW_INVALID: preload("res://assets/sfx/draw_invalid_spell.mp3"),

src/scripts/spells/push_back.gd

@@ -1,8 +1,7 @@
 extends SpellBase
 
-var Pushback_Projectile = preload("res://scenes/projectiles/pushback.tscn")
+const PushbackProjectile = preload("res://scenes/projectiles/pushback.tscn")
 
 func cast(player: Player, _enemies: Array[Node]):
 	SfxAudio.play_sfx(SfxAudio.Sound.PUSH_BACK)
-	var projectile = Pushback_Projectile.instantiate()
-	spawn_projectile(player, projectile)
+	spawn_projectile(player, PushbackProjectile.instantiate())