I like it, it plays well.. it reminds me of the old game "Tapper"
You have the mechanics now it just seems all you need to do is perfect the level design.
When you die it seemed a little rushed, would like to see that animation a little smoother and at a slower pace..When I finally died it all happened so fast I was surprised.."oh I'm dead?". I think you need more warnings you are low on health etc... Also the act of taking damage happens and I can't sense what is happening.. maybe a screen shake for each hit, or screen flash? subtle stuff just to tell me I'm taking damage. And I seemed to die pretty quick when I did take damage...maybe add more health?