Here's a neat tidbit we found last night:
Each course in Danny Sullivan's Indy Heat (Arcade) has artist credits somewhere on it! Most of these are signed by "SH" (Steve High, credited for Software & Graphics), but a few have other initials on them, including one course which has a completely different style and signature.
I've put up an imgur gallery with all 14 courses and which are signed by which artist here! https://imgur.com/a/xNErJIJ