So, finally done. I decided that my little game, inspired by the VCS classic is now finished.
"GEISTERHAUS" is the German word for a building that is haunted
The game is programmed for PAL, but also runs on NTSC machines. (But I only did a color adjustment and no speed adjustment. That means it runs a bit faster on NTSC than under PAL).
I could test the game only on my PAL hardware, NTSC only on the emulator. So it would be very helpful if someone with realt NTSC