previous levels

can you go back to previous levels that you have already played?
zabond

Yes. Instead of clicking continue game, click the button next to it (new experiment, i think it is).

Also If you click Change Lab on Main Menu you can choose New Challenges, another 103 levels, so were not finished when we get to level 102. Thats 205 levels altogether

And you can create you're own experiments in My Lab.