Okay at best
While SNake is a classically fun game, the 'fun' here isn't accomplished well.
The main problem is that it doesn't go anywhere. Most snake games get gradually faster as the snake gets longer, this doesn't happen here and therefor while the snake gets longer, it doesn't get much harder and gets boring quite quickly. The cake and the snake are quite hard to see against the animated background, and even against the static BG it is still hard to make objects out.
Fun premise, but you have a lot to work on.