Interesting idea...
...but it's broken. Not only is it FAR too hard for the average player, but after finally getting to the final stage and managing to get through without hitting anything, I was told I'd failed. I repeated the stage to check I hadn't accidentally hit something, but no - you simply get to the end of the stage (when all the blocks have disappeared) and you automatically fail.
Anyway, it's an interesting idea and I liked the challenge of learning the block positions and timing, but it's a shame you can't complete it and I imagine the majority of players will be extremely annoyed with the difficulty.