Missing Files

I downloaded Mini Golf Resort for Wii and then extracted the iso. When I tried to extract the files from the iso, there was nothing there. No files. What's going on? Am I wasting my time here downloading games that aren't playable? I have downloaded games from another site also that were not playable. Getting very frustrated.

Classic issue. Upgrade your WINRAR program to v.5.0 or higher. Try again extracting that file.
Read the "DETAILS" written on the Wii download links beforehand. It's stated there.