Just GotRoot! This is one of my favorites boxes. Not sure if I followed the designed path but I got root before I got user, curious to see other peoples wright-ups later on. I did get stuck twice on this box ( initial foothold and root privesc)
Nudges:
Initial foothold: Don’t overthink this or go for the rabbit holes. Make sure to enumerate the page and read everything for clues. Once you know you are in the right place GOOGLE.
User: Once you find yourself with a shell enumerate and investigate anything interesting
Root: Easiest root I’ve ever done. simple privesc script and a quick google is all you need