diff --git a/.vscode/settings.json b/.vscode/settings.json
index 25c16d3..6c2e911 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -3,6 +3,7 @@
     "files.associations": {
         "isometricrenderer.h": "c",
         "sprite.h": "c",
-        "map": "c"
+        "map": "c",
+        "isometricmap.h": "c"
     }
 }
\ No newline at end of file
diff --git a/Input/inputHandler.c b/Input/inputHandler.c
index 524e0a0..05a342f 100644
--- a/Input/inputHandler.c
+++ b/Input/inputHandler.c
@@ -67,8 +67,12 @@ void mouseInput(InputHandler *inputHandler, List *sprites, Texture2D *texture, C
     // TODO: n=2 no good style, but Segmentation fault when > layerAmount
     for(n = 9; n >= 0 ; n--){
         if(layers[n] != 0){
+            float tileWidthHalf = layers[n]->tileTextures[0].width / 2;
+            float tileHeightQuarter = layers[n]->tileTextures[0].height / 4;
+            int mouseAdjustmentX = -tileWidthHalf;
+            int mouseAdjustmentY = -tileHeightQuarter + (tileHeightQuarter * layers[n]->layer);
 
-            IsometricMapProject(layers[n], camera, inputHandler->cursorPos.x, inputHandler->cursorPos.y, &inputHandler->cursorWorldPos);
+            IsometricMapProject(layers[n], camera, inputHandler->cursorPos.x + mouseAdjustmentX, inputHandler->cursorPos.y + mouseAdjustmentY, &inputHandler->cursorWorldPos);
            
             Tile *selectedTile = IsometricMapGetTileFromWorldCoordinates(layers[n], inputHandler->cursorWorldPos.x, inputHandler->cursorWorldPos.y);
             
diff --git a/IsometricMap/isometricMap.c b/IsometricMap/isometricMap.c
index d3325f6..486d968 100644
--- a/IsometricMap/isometricMap.c
+++ b/IsometricMap/isometricMap.c
@@ -64,12 +64,8 @@ void IsometricMapProject(IsometricMap *isometricMap, Camera2D *camera, float x,
     float tileWidthHalf = isometricMap->tileTextures[0].width / 2;
     float tileHeightQuarter = isometricMap->tileTextures[0].height / 4;
 
-    int mouseAdjustmentX = -tileWidthHalf;
-    int mouseAdjustmentY = -tileHeightQuarter + (tileHeightQuarter * isometricMap->layer);
-
-
-    x += camera->target.x + mouseAdjustmentX;
-    y += camera->target.y + mouseAdjustmentY;
+    x += camera->target.x;
+    y += camera->target.y;
 
     float xPos = (float) x;
     float yPos = (float) y;
@@ -82,11 +78,29 @@ void IsometricMapProject(IsometricMap *isometricMap, Camera2D *camera, float x,
     tmp->y = isoY * isometricMap->tileTextures[0].height;
 }
 
+void IsometricMapUnproject(IsometricMap *isometricMap, Camera2D *camera, int x, int y, Vector2 *tmp){
+    
+    float xPos = (float) x;
+    float yPos = (float) y;
+    
+    float worldX = (xPos - yPos) / 2;
+    float worldY = (xPos + yPos) / 4;
+
+    worldX += camera->target.x;
+    worldY += camera->target.y;
+
+    tmp->x = worldX;
+    tmp->y = worldY;
+
+}
+
+
+
 Tile * IsometricMapGetTileFromWorldCoordinates(IsometricMap *isometricMap, float x, float y){
 
     x = (int)(x / isometricMap->tileTextures->width);
-    y = (int)(y / isometricMap->tileTextures->height);
-
+    y = (int)(y / isometricMap->tileTextures->height); 
+    
     Tile *ptr = (Tile *) malloc(sizeof(Tile *));
     ptr->x = 0;
     ptr->y = 0;
diff --git a/IsometricMap/isometricMap.h b/IsometricMap/isometricMap.h
index fdb2681..172e98c 100644
--- a/IsometricMap/isometricMap.h
+++ b/IsometricMap/isometricMap.h
@@ -17,8 +17,6 @@ typedef struct IsometricMap{
 
 // TODO:
 Tile * IsometricMapGetTileFromWorldCoordinates(IsometricMap *isometricMap, float x, float y);
-// World Coordinates -> Screen Coordinates
-Vector2 IsometricMapUnproject(IsometricMap *isometricMap, Camera2D *camera, int x, int y);
 
 // Working
 IsometricMap * IsometricMapInit(int layer);
@@ -26,7 +24,8 @@ Vector2 * IsometricMapCalcOffsetForTileAt(int x, int y, int textureSize);
 Tile * IsometricMapGetTileFromArrayPosition(IsometricMap *isometricMap, int x, int y);
 // Screen Coordinates -> World Coordinates 
 void IsometricMapProject(IsometricMap *isometricMap, Camera2D *camera, float x, float y, Vector2 *tmp);
-
+// World Coordinates -> Screen Coordinates
+void IsometricMapUnproject(IsometricMap *isometricMap, Camera2D *camera, int x, int y, Vector2 *tmp);
 void IsometricMapAddTile(IsometricMap *isometricMap, int x, int y, int textureId);
 void IsometricMapChangeTextureIdOfTile(IsometricMap *map, int x, int y, int id);
 
diff --git a/README.md b/README.md
index 473ed99..1f4cd33 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ KI Gegner ist erstmal zu aufwändig, ein wenig Ackern muss man aber immer!
 Fantasy Welt oder Realistisch?
 
 ## Isometrie in RayLib
-[Projection Orthogonal -> Isometric](https://gamedevelopment.tutsplus.com/tutorials/creating-isometric-worlds-a-primer-for-game-developers--gamedev-6511)
+[Projection Orthogonal -> Isometric](https://clintbellanger.net/articles/isometric_math/)
 
 ## TODO
 
diff --git a/inputHandler.o b/inputHandler.o
index e29c5c6..00e4b49 100644
Binary files a/inputHandler.o and b/inputHandler.o differ
diff --git a/isometricMap.o b/isometricMap.o
index 63fe8af..7601d9d 100644
Binary files a/isometricMap.o and b/isometricMap.o differ
diff --git a/isometricRenderer.o b/isometricRenderer.o
index db7e73c..45aa438 100644
Binary files a/isometricRenderer.o and b/isometricRenderer.o differ
diff --git a/list.o b/list.o
index b6b631b..e71d5f1 100644
Binary files a/list.o and b/list.o differ
diff --git a/main.c b/main.c
index e046394..2e6fbbe 100644
--- a/main.c
+++ b/main.c
@@ -57,17 +57,10 @@ int main(){
     camera.rotation = 0.0f;
     camera.zoom = 1.0f;
 
-    // TODO -> Isometric Map Array for multiple Layers
-    // -> Make only most upper layer selectable
-    // take selected Tile, if that tile has one above select a tile in the upper layer
-    //IsometricMap *map = IsometricMapInit(50, 80, 0);
-    //IsometricMap *Layer1 = IsometricMapInit(20, 20, 1); 
-    //IsometricMap *Layer2 = IsometricMapInit(15, 15, 2); 
-    //IsometricMap *Layer3 = IsometricMapInit(10, 10, 3); 
-    //IsometricMap *Layer4 = IsometricMapInit(4, 4, 4); 
-
     IsometricMap **layers = (IsometricMap **) malloc(10*sizeof(IsometricMap *));
  
+    // Test Layers ---
+
     int n = 0;
     int i = 0;
     int j = 0;
@@ -110,6 +103,16 @@ int main(){
         }
     }
 
+    // -------
+
+    // Test of the IsometricMapUnproject Function
+    //Vector2 asdf = {500, 600};
+    //printf("unprojected %f %f\n",asdf.x, asdf.y);
+    //IsometricMapProject(layers[0], &camera, asdf.x, asdf.y, &asdf);
+    //printf("projected   %f %f\n",asdf.x, asdf.y);
+    //IsometricMapUnproject(layers[0], &camera, asdf.x, asdf.y, &asdf);
+    //printf("unprojected %f %f\n",asdf.x, asdf.y);
+
     // Hides the operating systems own cursor
     HideCursor();
     SetTargetFPS(60);
diff --git a/main.o b/main.o
index 2874e99..844c520 100644
Binary files a/main.o and b/main.o differ
diff --git a/spiel b/spiel
index 40605ca..cf5aad5 100755
Binary files a/spiel and b/spiel differ
diff --git a/sprite.c b/sprite.c
index fb668c9..4b23b3c 100644
--- a/sprite.c
+++ b/sprite.c
@@ -2,6 +2,7 @@
 #include "raylib.h"
 #include <stdio.h>
 #include <stdlib.h>
+#include "IsometricMap/isometricMap.h"
 
 void SpriteAdd(Sprite *sprites, int *spriteAmount, Texture2D *texture, int x, int y){
     if(*spriteAmount < 100){
diff --git a/sprite.o b/sprite.o
index 0dac02d..3ab2e3a 100644
Binary files a/sprite.o and b/sprite.o differ
diff --git a/tile.o b/tile.o
index b7873fa..ec204ad 100644
Binary files a/tile.o and b/tile.o differ