Gameplay is awesome, I can see myself legitimately playing something like this. I wish game was longer but hey, you had 3 days!
Game is not really using the theme, Intro aside, I see no soccer in this game (ball can be some lightning gun and work the same). And there is no leaderboard which is a shame (my score was 2554,75 and I have no idea if I did good or bad).
Game looks pretty cool, just pushing aside a bit unusual style and you have a coherent looks which represents clearly what game is about.
Sound is ok throughout the game and is pretty impressive in that intro, wish it was in game.