Kfet invaders version 1.1

Fixed a bug where in the first level, the mouse would not give any points.

Changed the music to some ai generated ones, would be interested in how you feel about this. Personally, I think it is more personal than general free assets and I don't have the time (or skills) to make the music myself or the money to pay an artist as this is just a free browser game so I personally like it, but I know a lot of people don't like the use of ai in art so I am curious about what you think.