One problem I had was that the speed of the blue dots kept changing.
I played a level and the blue dot went at a medium pace. Then, when I lost and came back to that level, I found it to move a lot faster than it had before. I checked again and saw that the speed continuously changed every time I played that level again. Sometimes, it was way too fast to click.
You should try to fix this before you submit it to ArmorGames or Kongregate.