I loved this! The comments basically summed up my thoughts, I think that a little intro or how to play sectionn would fare nicely, because at first I did not notice that you had to aim at all and just played it like a rythm game
The only thing that is worth mentioning and I didnt see in the comments is the bg which kinda sucks because it was very hard to focus on anything with it flashing :(
Anyways, good game :D