First, thanks for the tips.
No, it`s neither Creatures, Evolution nor SimLife (or else) nor Spore.
Spore do i have with Expansion Pack and no this is too new. Evolution is also too new.
Dunno, if i would have the Magazine-CD i could look under the shareware section. I think without any picture or other hints it will be very difficult to find this game, but since i`m searching for it for the last 3 years, time doesn`t matter anymore. :
