The mouse is still in the movie at the beginning! - Something like this would be possible to make in Unity without the use of the movie, using worldspace UI, which will allow for a higher resolution intro video, but good comedy!
The game does feel extremely slow, not as in it runs slow, but I feel like there could've been more exaggeration on the speed, less enemies, but much more speed.
I think you should also watch what you use for the music as well, you need to be very careful of copyright, for every instance of music in the game, if you were to develop this further, please take note of this as it can get you in a lot of legal trouble!
Great job on the models and particles! love them!