I played it and loved it. I would have rated it 5, but then I decided to try to get a Grand Master rating on every level. You set it up so that it is very unfriendly for anyone to try to obtain this. There is no restart level option. If you are not careful, you will have to restart the entire game to complete one level.
Some sections are very buggy. Level 7, 8, 12, 13, and 16, I believe, were often troublesome, resulting in me having to restart the game again. I finally quit on the perfect score. Your game was simply not trustworthy. I could not just practice to make sure I was good enough for it. I would often get close and then there would be a bug, and I would have to start over. it is a good game, but not good enough. Considering people are still playing this well after you made it means you did something right.