This was a good game, I just was terrible at it. Took me quite a few tries on the last couple of levels, the balls just kept wanting to return home to their launch point.
Despite only having two powerups, I never really found myself wanting more mechanics, what you have here is executed very well, like a gameboy Peggle. You could absolutely expand on this concept with more gameplay ideas and powerups, this is an excellent base that lends itself well to expansion.
I did find your music track to be very repetitive, it seemed to be only a few seconds long. I also appreciated being able to see the ball's initial trail, I have played similar games that just made me guess where it was going to go.
Overall this was a lot of fun to play, thanks for posting it.