I presented my film to a large group of 16-17 year olds and asked them to fill out a feedback form.
These were the questions on my sheet:

1. Do you feel the clip was an effective opening to a Thriller film?
If yes, what aspects made it effective?
If no, what made it ineffective

2. Was the soundtrack successful in creating an eerie atmosphere?
Yes
No
Partially

3. Did the soundtrack suit the film?
Yes
No
Partially

Can you say why?

4. Did you understand what was happening within the films at all times, or was it sometimes confusing?

5. Do you think the flashing images at the end were a good addition to the film?
If yes, why?
If no, why?

6. Can you state 2 aspects/additions I could change/make to improve the film as a whole?

I recieved many responses and nearly all of them were very positive.

Some of the most common aspects people enjoyed were:
- The flickering images (they created suspense and an eerie atmosphere)
- The music was very good at building tension
- The soundtrack was subtle and not overused
- The camera angles were very good at creating suspense
- The opening was confusing, but in a way that added to the overall atmosphere, and it leaves you on a cliffhanger.

Overall I think people enjoyed my film as mostly all of the feedback was positive, and I only recieved one or two comments about how I could improve it, so therefore they must have thought that it was successful in being the opening to a thriller film.