Probably there was a DOS version. This link here mentions a game music ripped from a 1996 "Crazy Drake" game:
http://www.mirsoft.info/gmb/music_in...d_ele=MTM4NTc=
This link here
http://yippee.i4free.co.nz/html/win/entert...t/title5687.htm implies in its short review that there was a DOS version.
So, maybe there really was a DOS version of this game. Whether or not this game is ESA protected, however, is another matter.