Add velocity HUD display (Velocity: 0) in top-left corner

resources/config/ui.json

@@ -163,7 +163,19 @@
 					  "hover": "resources/shoot_hover.png",
 					  "pressed": "resources/shoot_pressed.png"
 				  }
-			  }
+		},
+		{
+			"type": "TextView",
+			"name": "velocityText",
+			"x": 10,
+			"y": 10,
+			"width": 200,
+			"height": 40,
+			"text": "Velocity: 0",
+			"fontSize": 24,
+			"color": [1.0, 1.0, 1.0, 1.0],
+			"centered": false
+		}
 	  ]
 	}
   }