Unclear as to what the goal of the game is. For a soccer game I would assume the idea is to get the ball into the opposing goal but that did not give a point.
I would also recommend having a different control scheme. WASD should work the same as the arrows and O as an attack key is highly incomvenient, I would suggest choosing a key that is easier to access because now my left hand was used for attacking but that made jumping very awkward.
The visual style is pleasing and the audio is well done.