Here are the videos for each of the levels in my sketch.
Layer 1 (Start):
This is the first background the user will see and it's the most distorted out of all the backgrounds as it utilizes various distortion techniques such warping and blurring .
This background will appear once the user unlocks the first padlock, it's still heavily distorted however some of the motion effects used in the first background have been removed therefore it's visually clear that the user is progressing as there's evidence that the encryption is degrading.
Layer 3 of the sketch removes an overlaying cloud effect which was utilized in the previous background which greatly increases the visual clarity of the sketch for the user. This layer serves as the mid point in the sketch so the user can visually see that they have greatly progressed since the start however it's evident that there's still work to do.
Layer 4 removes all of distortion effects which hid the background previously however the image of a "safe" represents a "barrier" therefore the user would understand that there's at least one more layer to this puzzle before it's completely encrypted
Layer 5 (Final):
This is the final stage of the puzzle and congratulates the user on completing the puzzle. All of the padlocks must be unlocked to enable this background to show.