So this game was sometimes frustrating. When the ball falls down for the 20th time that's not a good feeling. Also the player movement speed is a bit slow, wich was not only boring sometimes, but it let me to restart a few times. It does give you morec ontrol over some sections, but still it could be a little higher.
I think the game would have been better with fewer levels and a bit more focus.
The good thing in it's design though that you kind of have checkpoints. This made getting a ball to it's place a HUGE relief and satisfying. The game made me feel very cool and clever when I made it trough some sections. I wish that there was some sort of ambient music wich let you zen out, that would have made a massive difference in my book.
The way you taught things to the player was pretty begginer friendly and you still gave the players challenge, though that was mainly in the form of execusion rather than puzzle. (I don't know if that was intentional or not)
Overall: Good game. It has some rough edges, but they don't ruin the experience as a whole.