You could replace your current saved games (which are in filename: "machinarium.sol") with the pre-saved .sol file that starts you off when you enter that level.
All the info you'll need to do that can be found in the
Shared Machinarium .sol Files thread.
Don't hesitate to ask any follow up questions and, BTW, be sure to save YOUR "machinarium.sol" file someplace safe on your computer in case you have some favorite saved levels in there that you may want to revisit some day.
