To fix the problem, run Germany 1985 first. With an 8MHz card, you could get an overall improvement of about 2x. I threw this together. One of the cool things about it is the user interface, which changes the text and background color registers when the scan line reaches certain points. This gives you more than one text color on the text screen simultaneously.
Source code is included.
This program is in the public domain. I thought this was the greatest game ever written when I first got into Apple IIs. If you can convince the old DOS 3.3 System Master to boot, and get AppleTrek copied onto a DOS 3.3 disk, you're home free. The program was completed, but never sold. It allows you to place icons on the hi-res graphics screen, and handles all aspects of controlling the mouse cursor, selecting buttons, and so on.