Greetings!
Firstly, I must admit, your budget is dangerously low for such a project. Video games involve an involved process. However, the good news for you is that I'd love to get a working game added to my portfolio and your idea seems very simple and manageable! Obviously your taking a chance with me but I don't intend to disappoint! I'd expect to tackle the project in java as that's my strongest language. My only concern is animations. Creating a background and moving football is simple compared to anything animated i.e. a foot or little player moving around to kick the ball. So if your looking for HQ animations, you may want to up your budget.
Happy choosing!