It's a bit more interesting setup. The defense prompt is disclosed, so you can tailor the attack. You can do multiple-turn attacks. And no, tldr or other simple attacks do not work with it. But I only have a single level, haven't had a moment to craft more yet.
There is also: https://gpa.43z.one/ multiple level, this one is not mine, and it also discloses the prompts that you are attacking.