The goal is to keep 3 letters in place, and only change 2 of them.
So DEBUT -> DEPOT (changed 3rd and 4th letter), or TANGS -> LUNGS (changed 1st and 2nd letter) would work. I would have liked better visual feedback to indicate this, but ran out of time.
I really like where your brain went though! I wanted to add bonus points for finding perfect anagrams like that, but ran out of time. I'd say you're playing on "extreme" difficulty 😉