Trying to show the package contents of an old app on my Mac, but it's showing up as a TextEdit file. [View all]

When I say old, I'm talking 1994. Back then, it would show as an executable app. I've extracted it from the CD-ROM to my current Mac (running Catalina), but the file is now showing as a TextEdit file. Even if there's no hope of running it on my current machine, I would still like to try and view the package contents. Does anybody know of a way to do this? (I've tried looking for a solution, but I can't seem to find the right combination of search terms.) Thanks!