Great work on another fantastically exciting take on a favorite show. I love how Mabel is so happy and enthusiastic even as everyone else draws back or cowers in terror. That huge happy face as she presses the button (a nice reminder to a pivotal moment) really shines. Dipper's full-body terror is awesome, and usually-unflappable Wendy's huge eyes and pose are terrific. Poor Pacifica though, too scared to even show herself. At least Waddles is taking it well.
The little touches are great too: Ducktective, the angry face on Dipper's warning about the costume box, etc. The narrowing perspective show off a lot of great stuff while also making the characters seem trapped. Terrific stuff all around.