Like many others have said, the paddles were also offset for me. This seems to me like it was a problem of using positions to define screen elements, but not accounting for different screen sizes.
To comment on how I feel about the other parts that I can see in this game: The visuals are simple and serviceable for this simple game. The audio is nice and fitting. The main gameplay mechanics has one weird design to me in that from what I can tell the paddle switch is only control by the Tab key, and it cycles in order with the 4 pads. That to me seems like it's going to be a pain point in the player experience because I will want to change the control to any given pad with just only one key, instead of having to press one key a bunch of times.