docs: update attribution to testacode

- Change copyright holder in LICENSE
- Update live URL to custom domain
- Add creator credit in README

Author: testacode

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2025 CharlieBrown
+Copyright (c) 2025-present testacode
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -200,7 +200,7 @@ Runs on every push to `master`:
 ### Deployment
 
 - **Automatic deployment** to GitHub Pages on push to `master`
-- **Live URL**: https://testacode.github.io/blockout/
+- **Live URL**: https://blockout.carlosmonti.com
 - Built with Vite and optimized for production
 
 ## License
@@ -209,4 +209,6 @@ MIT
 
 ## Credits
 
+Created by [testacode](https://github.com/testacode)
+
 Inspired by the classic Blockout game (1989) by California Dreams.