diff --git a/README.md b/README.md
index f0e5c5a..f301ccf 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # Snake
+Dieses Repo enstand als finales Projekt fuer das Modul Prozedurale Programmierung an der TUHH.
 
 zum Kompilieren:
 in der cmd: mingw32-make
@@ -8,3 +9,16 @@ SDL2.dll muss sich zudem im Ordner befinden
 erforderliche externe SDL-Libaries:
 
 https://www.libsdl.org/projects/SDL_image/
+
+---
+
+### Compile
+```
+cd [PATH_TO_LOCAL_REPOSITORY]
+mingw32_make
+```
+
+SDL2.dll has to be added to this folder beforehand
+
+link to external library:
+https://www.libsdl.org/projects/SDL_image/
diff --git a/main.c b/main.c
index e4e215c..7fa8699 100644
--- a/main.c
+++ b/main.c
@@ -10,11 +10,17 @@
 // speed in pixel per second
 #define SPEED (300)
 #define COLLECTVALUE (32)
+// Button Left
 #define LEFT  1
-#define UP    2
+// Button up
+#define UP   2
+// Button down
 #define DOWN  3
+// Button right
 #define RIGHT 4
+// Button / Sequence to quit
 #define QUIT  1337
+// Button / Sequence to pause
 #define PAUSE 155
 
 int dir;
@@ -24,6 +30,7 @@ int input (void);
 int main(int argc, char* argv[]) {
 
   /* BEGINNING OF SDL INIT */
+  //
   // initialize SDLs video and timer sdubsystem
   if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER) != 0) {
     printf("Fehler beim Initialisieren von SDL: %s\n", SDL_GetError());
@@ -75,6 +82,8 @@ int main(int argc, char* argv[]) {
     SDL_Quit();
     return 1;
   }
+
+  // create texture from surface which the renderer can draw to the backgroud
   SDL_Texture* tex_backgr = SDL_CreateTextureFromSurface(rend, surf_backgr);
   if (tex_backgr == NULL) {
     printf("Textur konnte nicht erstellt werden: %s\n", SDL_GetError());
@@ -83,6 +92,7 @@ int main(int argc, char* argv[]) {
     SDL_Quit();
     return 1;
   }
+
   // we can free the surface afterwards
   SDL_FreeSurface(surf_sheet);
   SDL_FreeSurface(surf_backgr);
@@ -91,15 +101,19 @@ int main(int argc, char* argv[]) {
   // structs for coordinates and dimensions of certain elements
 
   SDL_Rect fruit;
-  SDL_Rect snake[50]; //Maximale Länge von 50 Teilen -> Später durch dynamisches array oder linked list ersetzen!
-  /*snake[0].w = 64 / 2; //Kopf
-  snake[0].h = 64 / 2;
-  snake[1].w = 64 / 2;
-  snake[1].h = 64 / 2;
-  snake[2].w = 64 / 2;
-  snake[2].h = 64 / 2;
-  snake[3].w = 64 / 2;
-  snake[3].h = 64 / 2; //ende */
+
+  //Maximale Länge von 50 Teilen -> Später durch dynamisches array oder linked list ersetzen!
+  SDL_Rect snake[50];
+  /*
+   *  snake[0].w = 64 / 2; // -> Head
+   *  snake[0].h = 64 / 2;
+   *  snake[1].w = 64 / 2;
+   *  snake[1].h = 64 / 2;
+   *  snake[2].w = 64 / 2;
+   *  snake[2].h = 64 / 2;
+   *  snake[3].w = 64 / 2;
+   *  snake[3].h = 64 / 2; // -> Tail
+      */
 
 
 
@@ -130,6 +144,7 @@ int main(int argc, char* argv[]) {
   /* END OF SDL INIT  */
 
   /* BEGINNING OF GAME INIT */
+  //
   // Koordinatenursprung ist oben links, positive y-Achse zeigt nach unten
   snake[0].x = (WINDOW_WIDTH - snake[0].w) / 2;
   snake[0].y = (WINDOW_HEIGHT - snake[0].h) / 2;
@@ -147,7 +162,7 @@ int main(int argc, char* argv[]) {
 
 
 
-
+  // Spawn fruit at random location
   fruit.x = (rand()  % (WINDOW_WIDTH - 2 * fruit.w)) + fruit.w;
   fruit.y = (rand()  % (WINDOW_HEIGHT - 2 * fruit.h)) + fruit.h;
 
@@ -164,16 +179,12 @@ int main(int argc, char* argv[]) {
 
 
 
-
+  // set randomizer seed
   srand(time(NULL));
   /* END OF GAME INIT */
 
   /* BEGINNING OF GAME LOOP */
   while (dir != QUIT) {
-
-
-
-
     // process events
 
     // determine velocity
@@ -199,10 +210,6 @@ int main(int argc, char* argv[]) {
         dir_old = dir;
       }
 
-
-
-
-
       // update positions
       snake[0].x += x_vel / 60;
       snake[0].y += y_vel / 60;
@@ -236,7 +243,6 @@ int main(int argc, char* argv[]) {
 
       }
 
-
       // collision detection with bounds and "wrap around"
       if (snake[0].x < 0) snake[0].x = WINDOW_WIDTH - snake[0].w;
       if (snake[0].y < 0) snake[0].y = WINDOW_HEIGHT - snake[0].h;
@@ -252,12 +258,8 @@ int main(int argc, char* argv[]) {
             }
           }
 
-
-
       // clear the window / renderer
 
-
-
       // draw fruit
 
       //draw head of snake
@@ -304,7 +306,6 @@ int main(int argc, char* argv[]) {
 
     }
 
-
       // swap current visible rendered window with buffered
       // (double buffering)
       SDL_RenderPresent(rend);
@@ -318,8 +319,6 @@ int main(int argc, char* argv[]) {
       SDL_Delay(1000/60);
     } /* END OF GAME LOOP */
 
-
-
     // cleanup ressources
     SDL_DestroyTexture(tex_sheet);
     SDL_DestroyRenderer(rend);