Worth while..
A decent game, though i felt like the hit detection was a bit slow once the target really got moving. Very reminiscent of point blank, which is good, and a bit refreshing.
The only unfortunate thing was, for me, the ridiculous guitar noise that played faster and faster as the levels went on. It seems like a popular trend, so i can't really call it your fault, but everyone wants to use angry power chords to emphasize how intense their game is, and in honesty it's just annoying, particularly because of the generally scaled down quality of music that accompanies games due to file size.
Anyway, that's not really your fault, and you've made a good game here, othewise.
Oh, one thing, was there a minimum requirement to get through levels? I played a bunch of them and I never saw anything tell me the score parameters.