Hi I made contact with Jozsef Punk.
He kindly sent me this information:
Stalker is a prototype of an Amiga game I developed with two of my friends about 20 years ago.
The main unique feature of the game was the rearrangeable playfield.
The player controls a two leg robot in a scene that is built by same sized blocks.
These blocks are moveable in rearrange mode.
Ferenc Bardos - Graphics
Viktor Dara - Music
Jozsef Punk - Programming
If you are interested, I have different versions of demos of the game in adf files.
The game has never been finished and has not been released.
We did not find a publisher to finance the development.
Hopefully I will have some .adf files to try soon.