A simple educational game but unfortunatly little substance behind it. Variety was laking, the change in bubble speed and size is not enough. Also the fact some bubbles were hidden behind the bottel was annoying and unclear if this was ment to happen. One final point is that you should make it more clear on what the difference between levels is, I could not quite work it out, is it bubble speed, if so show something like bubble speed *2 somewhere on screen to indicate this. It does help with speedy addition, but is just not fun enough as a game to be on this site in my opinion 1/5