Wow, impressive you made this in only 4 hours!
I like the simplicity of the control method. It makes me think it would fit well on mobile!
I also think the little control tutorial animation is a really neat addition, well done! :) Very clear and simple what to do.
Perhaps controlling the paddle was a bit finnicky. Sometimes I felt I was just clicking at random. Maybe you could freeze or slow down time when the player is placing the paddle?
The difficulty curve maybe is a little steep, I think it could do with some more medium difficulty levels before getting harder.
Overall great effort! Enjoy playing some jam games!