I've played it a little bit now, and I like it. I've been thinking of making a similar game, so I enjoyed testing this.
The game has a nice flow, and I like how I get into a rythm and can just breeze trough it.
But there are something I would like to mention.
The hit detection seems a litte off. You can actually crash into the walls without dying. As long as you are not completely inside the wall, you won't die. This makes the game feel a little unprecise, and also very easy, as you don't really have to worry as much about crashing into the walls.
Other than that, I liked it. Nice concept, and nice music