I'm afraid your emulator and/or system must be broken:
* I have a real A1200 with a 68030 accelerator here, and the game has been developed (mostly) on it,
* for a while, I developed and tested the game on an A4000 with 68040,
* I have developed and tested extensively the game also on WinUAE, with a variety of settings,
* my testers tested the game on a variety of system (the last of which is the 68060 + AmigaOS 3.2 mentioned earlier),
* I never received a report regarding corrupted graphics,
so it's pretty safe to say that the game works just fine.
The game is coded entirely in assembly. For the graphics, I have used mostly Personal Paint. For the music, I used originally OctaMED SoundStudio and MilkyTracker afterwards.