skid particles + extra particles setting

Scripts/Classes/Entities/Player.gd

@@ -23,6 +23,8 @@ var RUN_SPEED := 160.0                 # The player's speed while running, measu
 var GROUND_RUN_ACCEL := 1.25           # The player's acceleration while running, measured in px/frame
 var RUN_SKID := 8.0                    # The player's turning deceleration while running, measured in px/frame
 
+var SKID_THRESHOLD := 100.0            # The horizontal speed required, to be able to start skidding.
+
 var DECEL := 3.0                       # The player's deceleration while no buttons are pressed, measured in px/frame
 var AIR_ACCEL := 3.0                   # The player's acceleration while in midair, measured in px/frame
 var AIR_SKID := 1.5                    # The player's turning deceleration while in midair, measured in px/frame
@@ -182,6 +184,8 @@ static var classic_physics := false
 
 var swim_stroke := false
 
+var skid_frames := 0
+
 var simulated_velocity := Vector2.ZERO
 
 func _ready() -> void:
@@ -208,6 +212,7 @@ func _ready() -> void:
 		camera.enabled = false
 	handle_power_up_states(0)
 	set_power_state_frame()
+	handle_invincible_palette()
 	if Global.level_editor == null:
 		recenter_camera()
 
@@ -280,6 +285,8 @@ func _physics_process(delta: float) -> void:
 	elif velocity.y > 15:
 		can_bump_sfx = true
 	handle_water_detection()
+	%SkidParticles.visible = Settings.file.visuals.extra_particles == 1
+	%SkidParticles.emitting = ((skidding and skid_frames > 2) or crouching) and is_on_floor() and abs(velocity.x) > 25 and Settings.file.visuals.extra_particles == 1
 	if $SkidSFX.playing:
 		if (is_actually_on_floor() and skidding) == false:
 			$SkidSFX.stop()
@@ -716,6 +723,7 @@ func power_up_animation(new_power_state := "") -> void:
 				sprite.sprite_frames = old_frames
 				await get_tree().create_timer(0.05).timeout
 		else:
+			handle_invincible_palette()
 			sprite.stop()
 			sprite.material.set_shader_parameter("enabled", true)
 			transforming = true