Cool! this game was really hard, I only managed the first few levels in 100 tries/lives.
It's very nice that the game loop is so fast. The instant reset was jarring at first, but I started really appreciating it after the first 20 deaths or so, and it really creates that "juuust one more try!"-feeling that I think is crucial for games of this kind.
I think that the game would benefit from a slower learning curve. What made me stop playing was the frustration from finally making it though a tricky bit and then instantly dying, followed by the realization that I would have to get through that same bit again only for the same thing to happen, again. So starting easier, with more save points/shorter levels, would make the game more suited to players like me.
That being said, I can totally see how the right player will get hooked on this! it really has that "..one more try!" quality to it :)