added d key to toggle debugging

README.md

@@ -81,6 +81,7 @@ While it runs, there are a couple of commands you can use:
 * s: save game state to file (can be loaded with -l)
 * c: enter copy mode. Mark a rectangle with the mouse, when you
   release the mous button it is being saved to an RLE file
+* d: toggle debug output 
 * q: quit
 
 # Report bugs

scene-play.go

@@ -203,6 +203,10 @@ func (scene *ScenePlay) CheckInput() {
 		scene.Reset()
 	}
 
+	if inpututil.IsKeyJustPressed(ebiten.KeyD) {
+		scene.Config.Debug = !scene.Config.Debug
+	}
+
 	if scene.Paused {
 		if inpututil.IsKeyJustPressed(ebiten.KeyN) {
 			scene.Config.RunOneStep = true