Me too got problems with that game
I tried to run it on a real A-500 ( kick1.3, 512k chip/512k fast ).
Since I got a 'missing returncode 20' error I switched to Kick 2.0 and also switched to 1MB chip, but this time I got the recoverable alert
Now, at last I tried to run the game on a A-1200 with 2MB chip and Kick 3.0, but the errormessage is still there !
Can you guys tell me how you run this game ? Or is this a special 'emulator only' version that won't run on a real Amiga