diff --git a/assets-fx/levels/tileset1b_bak.png b/assets-fx/levels/tileset1b_bak.png
deleted file mode 100644
index 2a94191..0000000
Binary files a/assets-fx/levels/tileset1b_bak.png and /dev/null differ
diff --git a/assets/level0.tmx b/assets/level0.tmx
index ada6b7b..a5b3e5e 100644
--- a/assets/level0.tmx
+++ b/assets/level0.tmx
@@ -3,54 +3,54 @@
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-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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+0,0,0,0,0,0,0,0,0,0,386,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,386,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,386,0,0,0,0,0,0,0,0,0,0,0,0,0,0,386,0,0,0,0,0,0,0,385,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,386,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
diff --git a/src/mapstruct.h b/src/mapstruct.h
index bcf1c77..321107b 100644
--- a/src/mapstruct.h
+++ b/src/mapstruct.h
@@ -3,6 +3,17 @@
 
 #include <gint/display.h>
 
+
+
+typedef struct {
+    /* the ID of the tile, as per tiled configuration, first is ID=0, then line by line, each line left to right, +1 at each tile.*/
+    int tileID;
+    /* maximum speed on that tile for the player */
+    /* Note : Speed = 0 means that the tile is not walkable */
+    int speed;
+} Tile_Data;
+
+
 typedef struct {
     /* width, height and the number of layer of the map */
     int w, h, nblayers;
@@ -15,4 +26,5 @@ typedef struct {
     short *layers[];
 } Map;
 
+
 #endif