2012.05.23Twenty times on the loom, put back your work
The night gives good advises and I prefer this interface:
Once skinned it will be more intuitive even if it requires a little bit more effort from the player.
Put your finger on an anchor (gray discs) and make the thing spin. The board follow your finger and the movement is validated when your release your finger.
The system accept fast movements and incomplete rotations to reduce finger strain :)