Very late to the party, but I've had a quick look at your game, it's quite fun!
As for feedback:
The coin sound seemed to stop working at the end of the second level.
It wasn't immediately obvious when I ran out of energy for the first time, perhaps some large "out of energy" message could show up if the player is holding the button down when there is no energy left?
And finally, "clockwise" and "anti-clockwise" in the tutorials? :)
- Grey