I can't get past the craters.

Once you pass safely by the Tentacle Creature - you'll come across a group of smaller craters.

Some craters have steam emitting from them and some craters don't.

Have you tried walking into each crater?

The steam craters have a different effect then the non-steam craters.

After testing each crater you may discover that you should just trying avoiding them altogether.

You will have to navigate Lenny through the craters with a series of carefully chosen mouse clicks!