Hello Tezz and Mariusz, thank you for very nice port of Jack the Nipper. I made a map with walkthrough here: http://atari.panprase.cz/?action=detail&co=6592
I noticed one graphic bug in version 1.1 in two screens where you can get to if you have Key item in inventory. In these two screens some enemy npcs freeze and upper part of screen make rest npcs and player himself invisible, then it is hard to move to exit "door" (bugged part of screens are marked on screenshots below by yellow color). It happens in both versions of game (xex and atr).
In version 1.0 everything was fine with these two screens.