add some signals to the event bus

scripts/Event.cs

@@ -0,0 +1,15 @@
+using Godot;
+
+public sealed class Event : Node
+{
+	[Signal]
+	delegate void EnergyCollected(int energy);
+	[Signal]
+	delegate void BoltCollected(int bolt);
+	[Signal]
+	delegate void InvincibilityCollected();
+	[Signal]
+	delegate void FireCollected();
+	[Signal]
+	delegate void PlayerTouched();
+}