Unscrew colored bolts into matching toolboxes and clear the workbench.
The workbench is a pile of wooden planks pinned down by colored bolts. Tap a bolt that nothing covers and it spins out into the toolbox of its color. Fill a toolbox with three bolts and it ships off to make room for the next one.
Pull the right bolts and planks swing loose, dangle from their last bolt and drop away to reveal what lies underneath. Pull the wrong ones and the spare tray fills up fast. Every level is checked to be solvable, so there is always a way out.
Tap a bolt that no plank covers. It goes into the open toolbox of the same color, or into the spare tray if that color has no open toolbox. Clear every plank before the tray fills up.
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