Rename the zip file .rar to .apk it might work if not then the file was not ment for Android.
Renaming file types is the wrong thing to do, it won't magically change the file type just by renaming it.
Try a different file browser like CX File Explorer, it has an option to extract zip files (hold press the sip file, More menu at the bottom right, Extract, Extract To on the popup so you can tell it where to put the game folder). Don't just tap the zip file to open it.