The Green Ball Maze

You have a ball that is covered in green paint. Your goal is to make it roll through every white square in the above grid exactly once. You can move the ball by tilting the grid. You can tilt the grid left, right, up or down. Once the ball begins to roll, it will only stop if it hits the edge of the maze, a black square or one of the already painted squares. You will have completed the challenge if the ball visits each of the white square exactly once. You can start the green ball in any white square you like and the ball can finish in any white square.

Scroll down for a clue and further down for the answer.

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Clue: In one solution, the ball begins in the square d2 and on your first move you roll it all the way to the left side of the grid.

Scroll down for the answer.

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Answer: One solution appears below.

Can you find any other solutions?