Funny one, got it on 2nd try. I like when studying the board a bit before to start allows to spot the route. That was the case here for me.
I remove one star because the visual feels a bit messy. Due to that, I felt like more can be done after finding the winning route.
Good one that I find interesting, thanks the different plausible ways to use the locks and a few alternate wrong paths. It can probably turn into something more difficult by opening a few wall blocks.
One star for the intense relief I felt after I got it done... Sorry, but the repeat of the same locks and tricks one after the other non stop till target was boring to me.
One hint here: as you progress, always check ahead and think carefully how to optimize the next lock opening. If you can get it on first try, it's nice.
I had a great time progressing my path from 6- to 4- to 2-off and then finally optimizing it fully. Some parts of the level are clearly out of reach but the sections of the level that are in play are more than enough to be a good challenge.