Great game, I had fun! I really like this concept for an arcade-style game -- it's a nice mix of familiar and creative. I played all 30 levels and the mechanics all worked very nicely, I liked the different enemies, and it had nice music/sound, too.
In terms of (hopefully helpful) feedback, I'd say the balancing could use some tweaks. One can make a ton of progress in the opening seconds, but once more than one enemy launches, the difficulty goes up very sharply. As a result, I learned that in many cases, it's better to cover a lot of ground right away, and if more than one enemy gets loose, to just die. One can generally defeat the round quickly after that, because the progress carries over. Choosing a free life upgrade, together with point bonus lives, is more than enough to make this a workable approach (on my first try at the game, I finished with 14 spare lives). Perhaps shortening the pre-enemy period, or erasing progress at each death, together with less frequent release of enemies, would smooth out the difficulty? I wasn't able to make the extra broom a big advantage, but maybe I just needed work at it. The extra life was too valuable to pass up, because of that opening pre-enemy time for each life.
Again, awesome game!