diff --git a/disassembler b/disassembler
new file mode 100755
index 0000000..d8c1617
Binary files /dev/null and b/disassembler differ
diff --git a/disassembler.c b/disassembler.c
index 30f3cd3..d02703e 100644
--- a/disassembler.c
+++ b/disassembler.c
@@ -6,6 +6,9 @@
 // How to compile? Like this!
 // gcc -o disassembler disassembler.c -lcjson
 
+// How to run? Like this!
+// ./disassembler snake.gb
+
 // Large chunks of the code are from my Intel 8080 emulator
 
 typedef struct buffer {
@@ -35,11 +38,10 @@ buffer* read_file(char** argv) {
 
 cJSON* read_cjson() {
     FILE *fs = fopen("Opcodes.json", "rb");
-    if (fs = NULL) {
+    if (fs == NULL) {
         printf("ERROR: Unable to open the Opcodes.json file.\n");
         return NULL;
     }
-  
     // read the file contents into a string 
     fseek(fs, 0L, SEEK_END);
     int fsize = ftell(fs);
@@ -62,11 +64,14 @@ cJSON* read_cjson() {
         cJSON_Delete(json);
         return NULL;
     }
+    free(b->buffer); // almost forgot that dataleak
     free(b);
     return json;
 }
 
 void print_buffer(buffer* b) {
+    // just a check
+    // equivalent to $ xxd snake.gb
     for (int i = 0; i < 40; i++) {
         printf("%02x \n", b->buffer[i]);
     }
@@ -87,7 +92,7 @@ int disassemble8080(buffer* b, int pc, cJSON* json) {
     }
     cJSON *command = cJSON_GetObjectItem(unprefixed, code);
     if (command == NULL) {
-        printf("Error: Command with opcode %s not found.\n", opcode);
+        printf("Error: Command with opcode %s not found.\n", code);
         return 0;
     }
     cJSON *mnemonic_item = cJSON_GetObjectItem(command, "mnemonic");
@@ -99,11 +104,11 @@ int disassemble8080(buffer* b, int pc, cJSON* json) {
     }
 
     if (bytes_item != NULL && cJSON_IsNumber(bytes_item)) {
-        *bytes = bytes_item->valueint;
+        opbytes = bytes_item->valueint;
     }
     // Here ends the cJSON part
-    printf("%d\n", opbytes);
-    printf("%s\n", mnemonic);
+    printf("Number of Opbytes: %d ", opbytes);
+    printf("Mnemnoic: %s", mnemonic);
 
     if (opbytes > 5 || opbytes < 1) {
         opbytes = 1;
@@ -123,7 +128,7 @@ int main (int argc, char** argv)  {
         return 1;
     }
     print_buffer(buff);
-    JSON *json = read_cjson();
+    cJSON *json = read_cjson();
 
     if (json == NULL) {
         printf("main terminated\n");