I think you need to do some modifications of the code. The rendering to be more specific. I think the source code assume it is running on a screen with 80-columns and it use a lot of fixed screen positions. But give it a try, let me know if you succeed.
I have uploaded a new version of the game that you can try to compile on your c64. I have added constants for the screen width that you need to set. Let me know if you get it to run.
