When my CoSysOp uploaded this game to SECOM, he did it asking me if I
could check it before validating the upload. Reason being he couldn't
get it to work on his Falcon.

Neither could I.

I asked the people in comp.sys.atari.st if anyone knew what was wrong,
and got this reply:

***

From: Vincent.Lefevre@ens.ens-lyon.fr (Vincent Lefevre)
To: rickard.troedsson@troed.ct.se

I've found the bug (thanks to ADEBUG :-).

At the address $4AB0 of the TEXT segment, you have to write $4E71 (just
after 00 1B), which corresponds to a NOP instruction, to cancel the check.

Explanations:
At the address $4AAC, one has "CMPI.W #$1B,D7", where D7 contains the
graphic mode. And at the address $4AB0, one has a BNE... i.e. if the
graphic mode isn't $1B, the game doesn't start. But I think that with
many monitors, the graphic mode is $3B (PAL flag = 1); so it doesn't
work.

Vincent Lefevre

***

I did the above patch, and it's the patched version you will find in
this archive.

Happy playing! (And remember to boot it in 640*480*256!)

_______
 (roed  -  System Manager on SECOM - +46-451-91002 - The best ATARI BBS!