RZX Adventurer feedback for playing the solution on Spectrum says:
"Part 1 immediately goes wrong:
N, W, W, U, Examine trees, Take berries
The trees are mentioned in the location, but examining them we "see nothing special" (I tried SEARCH too) and thus no berries are available. "
So there's a good chance that the second part of the solution won't work on the Amstrad either