I did thought of adding some more levels but I had less time. Since I was the only person developing this and nobody around me plays games, I couldn't get the play testing done for the overall speed of the game. I iterated over it a couple of times and ended up having the one which felt comfortably challenging to me as a player. Thank you such good response, this really cheers me up and provides the best dopamine hit one can get. :)
I am going to play your game now. :D