Thanks^^
I've just made a few quick fixes, the web build is version 2 now, but version 1 is still available.
1) Now you just bump into a wall rather than step forward (but if you liked the other way better I can easily switch it back).
2) Slightly increased volume.
3) Placed gold in a somewhat harder to reach spot. The original placement was from Russel & Norvig, but it was a bit too easy to find the gold by accident.