Hi there! I tried to make it so that you don't need to play them in any particular order, but I think the best bet would be to play this one first and The Witch's Puppets second!
One of the lockers within the locker room contains the heart! I admit the lock solution is a little obtuse, but it's the number of lockers time the number of rows of lockers. Then you add the number of shelves in the dark room. Then add 29 (the number of the locker marked with a ! on the paper)
Thanks again! Puzzle with lockers IS a little bit too hard, but that helped me understand - if i can't solve something that just means i'm stupid and haven't tried everything:>
Oh no, you'd be fair to be confused by some of my puzzles! I'm still new to trying to balance and make good puzzle design, so I expect there to be hiccups along the way. Please don't feel bad about yourself!