None of the "newer" graphics I've seen for Repton ever seem to get it quite right for me - Repton just doesn't look like himself (herself? itself?) in them.
IIRC there was a bug in Repton 2 that made it impossible to complete (a missing diamond), I hope that's not present in this version. If I'm wrong about that then it might be out with the Beeb emulator, at the very least (I can cheat in that by saving snapshots of the emulator).