- adding coins

- performance improvements
- shake effect
- keyboard support

scenes/coin/spawner/coin_spawner.gd

@@ -0,0 +1,22 @@
+extends Marker2D
+
+var speed
+
+func _ready() -> void:
+	speed = $"/root/Global".speed #get_parent().speed
+	_spawn()
+
+
+func _spawn() -> void:
+	var coin = preload("res://scenes/coin/coin.tscn").instantiate()
+	speed = $"/root/Global".speed
+	
+	var v1 = 1.5 - (speed / 200)#260
+	var v2 = 2.0 - (speed / 200)
+	coin.global_position.y -= randi_range(0,2)*16
+	$"../CoinSpawnTimer".wait_time = randf_range(v1,v2)
+	add_child(coin)
+
+func del_all():
+	for child in get_children():
+		child.queue_free()