diff --git a/README.md b/README.md
index c3ebc73..eb4441f 100644
--- a/README.md
+++ b/README.md
@@ -6,15 +6,14 @@ Super Duper Metroid is a Super Metroid patcher and interface program, intended f
 # Building
 Requires an adequate version of python  
 Steps:  
-1.) Clone this repository  
-2.) Open a terminal in the repository's root  
-3.) Create a virtual environment by running `py -3.9 -m venv venv`  
-4.) Open virtual environment with `venv\scripts\activate`  
-5.) Install requirements by running `python -m pip install -r requirements.txt`  
-6.) Build Cython code by running `python setup.py`  
-7.) Install as editable by running `py -3.9 -m pip install -e .`
+1. Clone this repository
+2. Open a terminal in the repository's root
+3. Create a virtual environment by running `python -m venv venv`
+4. Activate the virtual environment with `call venv/bin/activate` on Windows or `source venv/bin/activate` on Unix-based systems
+5. Install requirements by running `python -m pip install -r requirements.txt`
+6. Install as editable by running `python -m pip install -e .`
   
-You can now run scripts from the project from terminal, using the virtual environment.  
+You can now run scripts from the project from terminal, using the virtual environment. Or run `python -m Super-Duper-Metroid` to patch the game via a CLI interface.
 
 # Credit
 Credit goes to Samuel Roy for writing most of this code.  
diff --git a/src/SuperDuperMetroid/__main__.py b/src/SuperDuperMetroid/__main__.py
new file mode 100644
index 0000000..d1c06db
--- /dev/null
+++ b/src/SuperDuperMetroid/__main__.py
@@ -0,0 +1,24 @@
+import json
+from SuperDuperMetroid.ROM_Patcher import patch_rom_json
+from io import BytesIO
+import argparse
+from pathlib import Path
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--input-rom-path", type=Path, required=True)
+    parser.add_argument("--output-rom-path", type=Path, required=True)
+    parser.add_argument("--json-path", type=Path, required=True)
+    args = parser.parse_args()
+
+    rom_file = BytesIO(args.input_rom_path.read_bytes())
+
+    with args.json_path.open() as json_contents:
+        patch_data = json.load(json_contents)
+
+    patch_rom_json(rom_file, args.output_rom_path, patch_data)
+
+
+if __name__ == "__main__":
+    main()