Solution to the stone puzzle in Level 12

Number the three round knobs on the top row - 1, 2, 3

Number the two round knobs on the bottom row - 4, 5

Press on them in this order - 4, 2, 5, 1, 3, 1, 5.

I tried this under two different player names several times. I exited the game and let it start over so it could reset if it wanted to, but it was the same each time. I hope this works for you!