good puzzle, definitely not simple, not for me anyway
mind you, i totally confused myself on the timer, i'd worked out that you didn't need the spare wooden box, i had everything more or less right and got the timer going then i saw i'd not covered the light blue button.
in one of my denser moments i then thought i needed the box.
after about 10 minutes of staring at it wondering how on earth i could get the box out, i suddenly realised what i'd done wrong.
i'd pushed the bottom green sphere left to get the timer going. DOH!
![Laughing :lol:](./images/smilies/icon_lol.gif)