The solutions to the puzzles might not necessarily be the only solution, but they are the first ones that I worked out.



Clicking on the arrows will move the piece of the puzzle that is closest to that arrow. Clicking on the pipe sections in the middle of the puzzle will rotate that section.
The different sections of the puzzle are numbered and the three empty bays are lettered. For instance, 1 to A means line up whichever of the centre pipe sections is needed in order to move puzzle piece 1 to empty bay A. 4 to top green mean move puzzle piece 4 to the top part of the green shaded section.

1 to A, 4 to C, 3 to B, 5 to centre green, 4 to top green (green complete), 2 to C, 7 to top red (red complete), 3 to bottom purple, 2 to middle purple, 1 to top purple (purple complete).



Simply click on the buttons as labelled in the picture in the following order:
B1, C4, A4, D1, B1, C4, A1, D4, B2, C3, C2, B3, A2, D3, B4, C1, A3, D2, B1, C4.



Click on the arrows as numbered in the following sequence. Note that sinking the silver coin instead of the gold will reset the puzzle.

4, 3, 2, 3, 4, 1, 2, 1, 4


4, 3, 3, 3, 4, 1, 2, 3, 4, 3, 2, 1, 4, 3, 2, 1


1, 2, 1, 4, 3, 2, 1, 2, 3, 1, 3, 2, 1, 4, 3, 2, 1, 2, 3, 2, 1, 2, 3, 4, 3, 2, 1



I havent numbered all the buttons as it makes the screenshot look to cluttered. Just apply the numbers in the A column to the B,C and D columns. Just click the buttons in the following order:

A - 4, 2, 4, 2, 5, 2, 4, 2, 4
B - 6, 1, 6
C - 4, 2, 5, 2, 4, 2, 5, 2, 4
D - 4, 2, 5, 2, 4, 2, 5, 2, 4, 2, 5, 2



Just follow the red line from bottom left to top right.




It doesn't seem to matter in which order you insert the puzzle pieces that have more than one piece i.e. the three green pieces.



Just rotate the rings until it looks like the screenshot. It's easier to rotate from the outer rings to the inner.