Fix layer 0 bug

data/level.go

@@ -69,7 +69,7 @@ func (lvl *Level) Height() int {
 	for _, l := range lvl.Layers {
 		for _, f := range l.Frames {
 			if (len(f) + l.V) > max {
-				max = len(f)
+				max = len(f) + l.V
 			}
 		}
 	}
@@ -164,8 +164,10 @@ func (lvl *Level) GetFrame(o, w, maxW, frameNo int) (ret *Frame) {
 			lW := layer.Width()
 			if !layer.Repeat {
 				lW += maxW
+				if layer.D != 0 {
 					off += maxW
 				}
+			}
 
 			for off < 0 {
 				off += lW

levels/locoworld/Manifest.json

@@ -31,6 +31,14 @@
 	  "Speed": 2,
 	  "Repeat": true,
 	  "Transparent": " "
+	},
+	"overlay": {
+		"Z-Index": 10,
+		"Direction": 0,
+		"Speed": 0,
+		"Repeat": false,
+		"V-Offset": 25,
+		"Transparent" : " "
 	}
   }
 }

levels/locoworld/overlay/1.frame

@@ -0,0 +1,4 @@
+  .___________________.
+   |                 |
+   |  gosl demo lvl  |
+   |_________________|