diff --git a/include/ground.h b/include/ground.h
index 9570494..5f11ca2 100644
--- a/include/ground.h
+++ b/include/ground.h
@@ -143,7 +143,7 @@ enum GroundArgType {
 struct GroundArg {
     enum GroundArgType type;
     union {
-        const char* ref;
+        char* ref;
         GroundValue value;
     } as;
     
diff --git a/meson.build b/meson.build
index 7b82d26..9d9d940 100644
--- a/meson.build
+++ b/meson.build
@@ -21,6 +21,11 @@ sources = files(
     'src/Free/Struct.c',
     'src/Free/Value.c',
 
+    'src/Free/Arg.c',
+    'src/Free/Instruction.c',
+    'src/Free/Program.c',
+    'src/Free/State.c',
+
     'src/Function/appendInstruction.c',
     'src/Function/appendArg.c',
 
diff --git a/src/Instruction/execute.c b/src/Instruction/execute.c
index bbc716e..76fe8c5 100644
--- a/src/Instruction/execute.c
+++ b/src/Instruction/execute.c
@@ -137,13 +137,27 @@ int64_t _GroundInstructionExecute(GroundInstruction* instruction, GroundValue* h
         Ground.Log.Warning("EXISTS is deprecated");
         return -1;
     }
-    SETLIST: {}
-    SETLISTAT: {}
-    GETLISTAT: {}
-    GETLISTSIZE: {}
-    LISTAPPEND: {}
-    GETSTRSIZE: {}
-    GETSTRCHARAT: {}
+    SETLIST: {
+        return -1;
+    }
+    SETLISTAT: {
+        return -1;
+    }
+    GETLISTAT: {
+        return -1;
+    }
+    GETLISTSIZE: {
+        return -1;
+    }
+    LISTAPPEND: {
+        return -1;
+    }
+    GETSTRSIZE: {
+        return -1;
+    }
+    GETSTRCHARAT: {
+        return -1;
+    }
     ADD: {
         GroundValue* final = &heap[instruction->args.at[2]._offset];
         GroundValue* left = &instruction->args.at[0].as.value;
@@ -512,37 +526,99 @@ int64_t _GroundInstructionExecute(GroundInstruction* instruction, GroundValue* h
         heap[instruction->args.at[1]._offset] = Ground.New.Value.Bool(!instruction->args.at[0].as.value.as.Bool);
         return -1;
     }
-    GREATER: {}
-    LESSER: {}
-    AND: {}
-    OR: {}
-    XOR: {}
-    NEG: {}
-    SHIFT: {}
-    STOI: {}
-    STOD: {}
-    ITOC: {}
-    CTOI: {}
-    TOSTRING: {}
-    FUN: {}
-    RETURN: {}
-    ENDFUN: {}
-    CALL: {}
-    CALLMETHOD: {}
-    STRUCT: {}
-    ENDSTRUCT: {}
-    INIT: {}
-    GETFIELD: {}
-    SETFIELD: {}
-    USE: {}
-    EXTERN: {}
-    CREATELABEL: {}
-    PAUSE: {}
-    DROP: {}
-    LICENSE: {}
-    ERRORCMD: {}
-    THROW: {}
-    CATCH: {}
+    GREATER: {
+        return -1;
+    }
+    LESSER: {
+        return -1;
+    }
+    AND: {
+        return -1;
+    }
+    OR: {
+        return -1;
+    }
+    XOR: {
+        return -1;
+    }
+    NEG: {
+        return -1;
+    }
+    SHIFT: {
+        return -1;
+    }
+    STOI: {
+        return -1;
+    }
+    STOD: {
+        return -1;
+    }
+    ITOC: {
+        return -1;
+    }
+    CTOI: {
+        return -1;
+    }
+    TOSTRING: {
+        return -1;
+    }
+    FUN: {
+        return -1;
+    }
+    RETURN: {
+        return -1;
+    }
+    ENDFUN: {
+        return -1;
+    }
+    CALL: {
+        return -1;
+    }
+    CALLMETHOD: {
+        return -1;
+    }
+    STRUCT: {
+        return -1;
+    }
+    ENDSTRUCT: {
+        return -1;
+    }
+    INIT: {
+        return -1;
+    }
+    GETFIELD: {
+        return -1;
+    }
+    SETFIELD: {
+        return -1;
+    }
+    USE: {
+        return -1;
+    }
+    EXTERN: {
+        return -1;
+    }
+    CREATELABEL: {
+        return -1;
+    }
+    PAUSE: {
+        return -1;
+    }
+    DROP: {
+        return -1;
+    }
+    LICENSE: {
+        return -1;
+    }
+    ERRORCMD: {
+        return -1;
+    }
+    THROW: {
+        return -1;
+    }
+    CATCH: {
+        return -1;
+    }
 
     Ground.Log.Error("operation fell through in Ground.Instruction.execute()");
     Ground.Flags.error = true;
diff --git a/src/Internal/run.c b/src/Internal/run.c
index cad53b6..b37cdff 100644
--- a/src/Internal/run.c
+++ b/src/Internal/run.c
@@ -135,7 +135,7 @@ void _GroundInternalRun(GroundProgram* program, GroundState* state) {
                 break;
             default:
                 if (status < program->len) {
-                    i = status;
+                    i = status - 1;
                 } else {
                     Ground.Log.Error("out of bounds jump in Ground.Internal.Run()");
                     Ground.Flags.error = true;
diff --git a/test/test b/test/test
index 173b36e..afefbec 100755
Binary files a/test/test and b/test/test differ
diff --git a/test/test.c b/test/test.c
index 5ba51c0..c01260d 100644
--- a/test/test.c
+++ b/test/test.c
@@ -1,15 +1,29 @@
 #include <ground.h>
+#include <stdio.h>
 
 int main() {
     GroundProgram program = Ground.New.Program();
-    printf(Ground.Flags.error ? "true\n" : "false\n");
     GroundState state = {NULL, NULL, NULL};
-    GroundInstruction instruction = Ground.New.Instruction(GroundInstruction_ADD);
-    printf(Ground.Flags.error ? "true\n" : "false\n");
-    Ground.Instruction.append(&instruction, Ground.New.Arg.Value(Ground.New.Value.Int(2)));
-    printf(Ground.Flags.error ? "true\n" : "false\n");
-    Ground.Instruction.append(&instruction, Ground.New.Arg.Value(Ground.New.Value.Int(2)));
-    printf(Ground.Flags.error ? "true\n" : "false\n");
+
+    // Instruction 1: CREATELABEL start
+    GroundInstruction label_inst = Ground.New.Instruction(GroundInstruction_CREATELABEL);
+    Ground.Instruction.append(&label_inst, Ground.New.Arg.LabelRef("start"));
+    Ground.Program.append(&program, label_inst);
+
+    // Instruction 2: JUMP start
+    GroundInstruction jump_inst = Ground.New.Instruction(GroundInstruction_JUMP);
+    Ground.Instruction.append(&jump_inst, Ground.New.Arg.LabelRef("start"));
+    Ground.Program.append(&program, jump_inst);
+
+    // Execute program
     Ground.Program.execute(&program, &state);
-    printf(Ground.Flags.error ? "true\n" : "false\n");
+
+    if (Ground.Flags.error) {
+        printf("Error set during execution!\n");
+        Ground.Log.printErrors();
+        return 1;
+    } else {
+        printf("Success!\n");
+        return 0;
+    }
 }