hi-
i haven't had time to test on XP. from what it sounds like, it seems like you're trying to run the DOS version directly; this ends up running the game under NTVDM, which i haven't tested against yet. i'll see what i can do for the next update, but i'm not confident i can do a whole lot (could be related to file access, zen mode writes after each round)
the game is 32-bit because i used djgpp/allegro to write it. i'm not very confident in my ability to write an entire game in assembly just yet