The Hall of The Kunger Binb was written with (a modified version of) the lightweight Zeta emulator in mind. As such, it depends on quite a few emulation inaccuracies or additional features created by it -> such is the fate of an emulator designed to run two executables.
However, it is possible to work around the inaccuracies and provide such functionality on a real DOS machine.
Download BINBFIX v0.1, which should hopefully take care of everything; run "binbfix" before launching ZZT, and run "binbfix u" after you're done!
Doesn't mean the game isn't computationally intensive (due to having a complex script parser written in Turbo Pascal) - I recommend at least a 486@40MHz for guaranteed smooth playthroughs. (And, of course, keep discussion of any issues specific to real PC playthroughs to this thread.)
Known issues:
- The keyboard movement isn't as smooth as under the Windows/etc. build - this one might be a bit tougher to fix, but doesn't really prevent or strongly hinder playthroughs.