diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..8f4782a
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,40 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+       {
+            "name": "Debug test_stack",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/test_stack.exe",
+            "cwd": "${workspaceFolder}",
+            "MIMode": "gdb",
+            "miDebuggerPath": "C:/ProgramData/mingw64/mingw64/bin/gdb.exe",
+            "preLaunchTask": "Build via Makefile"
+        },
+        {
+            "name": "Debug test_numbers",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/test_numbers.exe",
+            "cwd": "${workspaceFolder}",
+            "MIMode": "gdb",
+            "miDebuggerPath": "C:/ProgramData/mingw64/mingw64/bin/gdb.exe",
+            "preLaunchTask": "Build via Makefile"
+        },
+        {
+            "name": "Debug test_bintree",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/test_bintree.exe",
+            "cwd": "${workspaceFolder}",
+            "MIMode": "gdb",
+            "miDebuggerPath": "C:/ProgramData/mingw64/mingw64/bin/gdb.exe",
+            "preLaunchTask": "Build via Makefile"
+        }
+ 
+
+    ]
+}
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 0000000..dad5165
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,27 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Build via Makefile",
+            "type": "shell",
+            "command": "mingw32-make",
+            "args": ["${input:target}"],
+            "options": {
+                "cwd": "${workspaceFolder}"
+            },
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "problemMatcher": "$gcc"
+        }
+    ],
+    "inputs": [
+        {
+            "id": "target",
+            "type": "pickString",
+            "description": "Welches Makefile-Target soll gebaut werden?",
+            "options": ["test_stack", "test_numbers", "test_bintree", "doble", "unitTests"]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/bintree.o b/bintree.o
index 47986c5..1e0c0fc 100644
Binary files a/bintree.o and b/bintree.o differ
diff --git a/doble b/doble
deleted file mode 100755
index 88b0bc9..0000000
Binary files a/doble and /dev/null differ
diff --git a/doble.exe b/doble.exe
new file mode 100644
index 0000000..8c669d3
Binary files /dev/null and b/doble.exe differ
diff --git a/doble_initial b/doble_initial
deleted file mode 100755
index 69c6a2e..0000000
Binary files a/doble_initial and /dev/null differ
diff --git a/doble_initial.exe b/doble_initial.exe
new file mode 100644
index 0000000..a91c009
Binary files /dev/null and b/doble_initial.exe differ
diff --git a/highscore.o b/highscore.o
index b268078..cf5a127 100644
Binary files a/highscore.o and b/highscore.o differ
diff --git a/highscores.txt b/highscores.txt
index 7f7e944..41cccf8 100644
--- a/highscores.txt
+++ b/highscores.txt
@@ -1,10 +1,10 @@
+Player1;19887
 Lena;19811
 Lena;19702
+Player1;19578
 player_name;9981
 Lena;9980
 Lena;9978
 Lena;9978
 Lena;9976
 Lena;9975
-Lena;9971
-Lena;9965
diff --git a/main.o b/main.o
index f167660..a04c31b 100644
Binary files a/main.o and b/main.o differ
diff --git a/numbers.o b/numbers.o
index e87e9fe..7824224 100644
Binary files a/numbers.o and b/numbers.o differ
diff --git a/stack.c b/stack.c
index 0472a36..8c63ec6 100644
--- a/stack.c
+++ b/stack.c
@@ -1,15 +1,15 @@
 #include <stdlib.h>
 #include "stack.h"
 
-// Pushes data as pointer onto the stack.
+// Push Daten auf den Stack legen.
 StackNode *push(StackNode *stack, void *data)
 {
     StackNode *node = (StackNode *)malloc(sizeof(StackNode));
     if(node == NULL)
         return stack; // allocation failed -> return unchanged stack
 
-    node->data = data;
-    node->next = stack;
+    node->data = data;      // Set the data for the new node   
+    node->next = stack;     // New node points to the previous top of the stack
     return node;
 }
 
diff --git a/stack.o b/stack.o
index 014f77e..3d96b0c 100644
Binary files a/stack.o and b/stack.o differ
diff --git a/test_stack b/test_stack
deleted file mode 100755
index fe4df87..0000000
Binary files a/test_stack and /dev/null differ
diff --git a/test_stack.exe b/test_stack.exe
new file mode 100644
index 0000000..b2c0199
Binary files /dev/null and b/test_stack.exe differ
diff --git a/timer.o b/timer.o
index c5283e8..80d7bf2 100644
Binary files a/timer.o and b/timer.o differ