Missing some hint at the beginning?

[gponzo]

I've being playing with my little daughter and in the very first mission she chose a wrong directory.

The fact is that the first hints report just "cd", "ls" and "pwd" commands, which could be enough, but there isn't (yet?) the "cd .." hint to know how to go back (and choose a different directory).

[rlepigre]

Indeed not, but you can always do gsh reset (see gsh help) to restart the current mission from the beginning.

[phyver]

Indeed. That's probably the easiest; and both gsh check, gsh reset should take you back to $HOME, while both gsh help and gsh goal will tell you about gsh reset.