Gameplay: Amazing! But why does the computer never get to serve? Also I think it's odd that your bat can overtake the ball in the air and when you then stop and it reaches the bat again, your opponent scores.
Creativity: Well ... table tennis is not your innovation, but I do not want to give a bad vote just because of that.
Graphics, Sound and Polish: I like the simple style and the sound. But you could have put in a photograph of a real tennis table or some pixel art. Extra points for linking to a website in Polish 😉.
Interpretation of Theme and Completeness of Game: The game is rather complete, but ... you play against each other, so I do not see the connection to the "together" theme. Yeah, there's a multiplayer mode, but it is still against each other.