One of my favorite C64 games! A more "Amiga-ish" soundtrack would have been really nice to have, but otherwise this is spot on.
I'll start by saying that I have some experience in pure programming, but I'm not entirely familiar with all the Amiga hardware variants.
That said, I've tested the game on my real A1200 and on various emulated machines, such as the basic A500 (only 512KB of Chip RAM) and the A600 itself (with 1MB of Chip RAM), and it works perfectly.
It's really difficult to figure out where the problem might be. Could you tell me if the game crashes immediately after loading or if it happens later? Could you give me the Guru Meditation code?
I decided to test more, starting with the most obvious, which is starting the machine without a startup-sequence. And that booted the game.
SO something in my Workbench setup is not playing nice with your game. What exactly, I don't know, but welcome to the nightmare of a fragmented platform :( It's so much easier on C64 in this aspect, we all have pretty much the same gear.
My Workbench setup is pretty vanilla which surprises me about this crash, but I do have resident stuff in memory (Commodities) and one of these is probably the culprit, probably the screen saver.
If you want me to test further, let me know!
So, we've established that the game works on your Amiga. Now, as you say, it could be a conflict with some utility in your operating system. Could you tell me if the game crashes immediately upon startup or if it does so later? If it crashes immediately (as I imagine), does it at least display a black, blank screen? Could you also see if the game still crashes by disabling the screen saver?
Could you try launching the game from the shell (CLI) instead of double-clicking the icon? Just type the executable file name and press Enter. If that still doesn't work, try increasing the stack size (the default should be 4096), for example, by typing "stack 32000" in the shell, and then restart the game.