Add todo for HUD

src/ddviz.py

@@ -30,6 +30,9 @@ def on_draw():
     gl.glPushMatrix()
     gl.glTranslatef((window.width - board_width * ppm) / 2, (window.height - board_height * ppm) / 2, 0)
     board.draw()
+
+    # TODO: draw estimated score, speed, ...
+
     gl.glPopMatrix()
 
 @window.event