Though the concept was really unique and refreshing, it became clear very early (in level 3 for me) that it doesn't really work. At some point the game became just ramming the down key in the hope that it works, and it didn't, so I died. It became a game of luck rather than a game of skill, which doesn't work.
However, it is great that you pushed the boundaries of game design this way, and even though it didn't really work out (at least in my eyes) I highly encourage you to keep doing so, because something truly unique and awesome is just waiting to be found!