A good idea, and a good start, but needs polishing
For starters, I will say that your game is good, but it really isn't anything new or special.
The controls are far too sensitive - one tap of a key can send you right to the end of a map, which proves to be extremely complicating when moving across tiles with increased speed.
The tiles are too small, making it difficult to control the ball properly, as well as providing little room for moving. This would not be as much of a problem if the controls were less sensitive.
The text on the info tiles could also last longer, as it very quickly becomes tedious to roll back onto past tiles just to read the small amount of text. The ball rolls over them far too easily.
There needs to be a clearly visible options to mute the music and to access the main menu from the game. As far as I can tell, you do not provide options for either of these, and can only toggle the music from the menu before you start. This can be very annoying.
I suppose most of those points do really come down to the point about controls, so yes, consider that the main point xD
However, the game did look very nice, and the objectives and events each of the tiles controlled were clearly explained.
The music was a nice additional extra, but did get annoying after a short period of time - as a lot of music loops do. However, you did provide a toggle option (albeit hard to get to), so the music only counts as a plus.
So overall, it is a good start, but needs the additional polishing and time taken to add in useful features to make it a truly finished game.