The website was allegedly posted before I obtained the engine code, however it then went on the site after I gave a copy of the engine code to someone in order to analyze and look for further exploits.
To clarify, I had no intention of hosting the files for public access and never did so. Any links to my site were immediately dead as they were only used so that a copy of the source could be obtained to analyze. The files were destroyed from the server after.
Aha. That's an unfortunate situation for you. Ultimately though, it seems like you dropped the ball by leaking the code to someone else: even if you weren't responsible directly for the site or for posting the code publicly, you were the one who made it possible. Hopefully you can learn from this experience.
---
Edit: You said "To clarify, I had no intention of hosting the files for public access and never did so. Any links to my site were immediately dead as they were only used so that a copy of the source could be obtained to analyze. The files were destroyed from the server after."
The links are dead. They were the links to the original uploads for the others to look at. The link was leaked to Andrew somehow. By looking at times, I'm very sure that the files were deleted from there before they were posted by Andrew.
I don't know and don't want to find out how he obtained those links. We're all a big group of people, but the links were never shared by me to him. He's a rash and irresponsible person as you can tell from that tweet.
2) Stole their source code and distributed it to others.
3) Unlawfully accessed and defaced their Twitter account.
Yes, you're clever, but your behavior is "rash and irresponsible." If I were you, I'd be on the phone with Lucas apologizing and getting ready for some community service.