Open Zorro (1985)(Datasoft)(US).xex to edit its rooms, tiles, colours, sprites, objects, collision and exits.
Zorro (1985)(Datasoft)(US).xex
Or drop the file here. Run python3 serve.py in atari/zorro/editor to load it automatically and play your changes in Altirra.
python3 serve.py
atari/zorro/editor