Update README.md

Author: TobiasMue91

README.md

@@ -10,10 +10,12 @@ Simple HTML games and tools created with ChatGPT.
 
 Some games contain assets (mainly background images). The images have been generated with the help of MidJourney and some sounds have been taken from pixabay.
 
-No cookies, tracking or server-sided data saving is done in this project. All tools are client-sided, limited to JS, CSS and HTML. 
+No cookies, tracking or server-sided data saving is done in this project. Almost all tools are client-sided, limited to JS, CSS and HTML. 
 
 Some data is stored in firebase and firestore. (multiplayer functionality in Tic-Tac-Toe and Rock-Paper-Scissors, highscores in Flappy Bird, savegames in Family Feud and Who Wants to Be a Millionaire and plans from the Household Planner)
 
+A few tools make use of the OpenAI Chat Completions API.
+
 **View current version:**
 
 https://www.gptgames.dev/
@@ -23,4 +25,11 @@ https://www.gptgames.dev/
 - [Ideas for Future Projects](https://www.gptgames.dev/IDEAS) - Explore potential future additions to the collection.
 - [Prompt Examples](https://www.gptgames.dev/PROMPTS) - See examples of prompts used to create the games and tools.
 - [Prompt Engineering Tips](https://www.gptgames.dev/TIPS) - Discover tips and tricks for effective prompt engineering.
-- [Instruction for Custom GPTs](https://www.gptgames.dev/GPTS) - Instructions for GPT's that have been created by me.
+- [Instruction for Custom GPTs](https://www.gptgames.dev/GPTS) - Instructions for GPT's that have been created by me.
+
+## Attribution
+
+GPTGames is released under the MIT License, meaning you're free to use, modify, and distribute this project however you like. If you found this project helpful or are using it as the foundation for your own work, I'd appreciate (though don't require) the following:
+
+- A simple mention that your project is based on GPTGames.dev
+- A link back to the original repository