I love the slo-mo stuff in here and yeah, the smoothness. But I think you should have used the slo-mo stuff as a power-up or something aw well.
Anyways, the gameplay is pretty boring and not really original. And it's becoming uninteresting to me quite fast because there are no levels or variation that way. Ummm... But still, nice effects and yeah. Some of the art wasn't bad.
Good job, but a little boring.