My score is coming from a variety of reasons, so I'll break them down into categories.
The story is definitely original, but I feel it was ruined between mediums and concept. It doesn't make much sense to me that Bill know's who both people are, but doesn't realize it until later. I do appreciate that you led us to understand why Bill is tied up in the first place.
I wasn't a fan of the animation on-top of photographs. I think it could have really looked up for ya if it was all drawn out or all live-action (Which wouldn't be an animation then). I would have also liked to have seen characters other than "Stick Dudes", it seems very common that I feel it's overused at this point. Even basic character concepts could help. Even character differentiation would help, this way we know which character is which. Maybe make one red, or blue, etc, not all one color.
The audio was "Meh". wasn't terrible, but wasn't great. I felt there was alot of background sound, and echo in the mic. I understand mics aren't created equal, but there are alot of tutorials out there that can fix it. Newgrounds User and Voice Actor "Rice Pirate" made a great budget-friendly tutorial as well, I would recommend seeing that tutorial. I personally think a pop-filter would help reduce the white noise and echo. You can put a sock over the mic or even nylon leggings. You can also put pillows and blankets up on the walls of a small room, and record in there to reduce echo.
I do see in your description that you're working on adding drawn objects and sets. I'm glad that you do realize the concept behind it and going the distance to fix it in the future. That tells me that you are trying, and want to improve. I applaud that. So please don't give up. You can accomplish your goal.